Index: frontend/node_modules/decimal.js/decimal.d.ts
===================================================================
--- frontend/node_modules/decimal.js/decimal.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/decimal.js/decimal.d.ts	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,301 @@
+// Type definitions for decimal.js >=7.0.0
+// Project: https://github.com/MikeMcl/decimal.js
+// Definitions by: Michael Mclaughlin <https://github.com/MikeMcl>
+// Definitions: https://github.com/MikeMcl/decimal.js
+//
+// Documentation: http://mikemcl.github.io/decimal.js/
+//
+// Exports:
+//
+//   class     Decimal (default export)
+//   type      Decimal.Constructor
+//   type      Decimal.Instance
+//   type      Decimal.Modulo
+//   type      Decimal.Rounding
+//   type      Decimal.Value
+//   interface Decimal.Config
+//
+// Example (alternative syntax commented-out):
+//
+//   import {Decimal} from "decimal.js"
+//   //import Decimal from "decimal.js"
+//
+//   let r: Decimal.Rounding = Decimal.ROUND_UP;
+//   let c: Decimal.Configuration = {precision: 4, rounding: r};
+//   Decimal.set(c);
+//   let v: Decimal.Value = '12345.6789';
+//   let d: Decimal = new Decimal(v);
+//   //let d: Decimal.Instance = new Decimal(v);
+//
+// The use of compiler option `--strictNullChecks` is recommended.
+
+export default Decimal;
+
+export namespace Decimal {
+  export type Constructor = typeof Decimal;
+  export type Instance = Decimal;
+  export type Rounding = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8;
+  export type Modulo = Rounding | 9;
+  export type Value = string | number | bigint | Decimal;
+
+  // http://mikemcl.github.io/decimal.js/#constructor-properties
+  export interface Config {
+    precision?: number;
+    rounding?: Rounding;
+    toExpNeg?: number;
+    toExpPos?: number;
+    minE?: number;
+    maxE?: number;
+    crypto?: boolean;
+    modulo?: Modulo;
+    defaults?: boolean;
+  }
+}
+
+export declare class Decimal {
+  readonly d: number[];
+  readonly e: number;
+  readonly s: number;
+
+  constructor(n: Decimal.Value);
+
+  absoluteValue(): Decimal;
+  abs(): Decimal;
+
+  ceil(): Decimal;
+
+  clampedTo(min: Decimal.Value, max: Decimal.Value): Decimal;
+  clamp(min: Decimal.Value, max: Decimal.Value): Decimal;
+
+  comparedTo(n: Decimal.Value): number;
+  cmp(n: Decimal.Value): number;
+
+  cosine(): Decimal;
+  cos(): Decimal;
+
+  cubeRoot(): Decimal;
+  cbrt(): Decimal;
+
+  decimalPlaces(): number;
+  dp(): number;
+
+  dividedBy(n: Decimal.Value): Decimal;
+  div(n: Decimal.Value): Decimal;
+
+  dividedToIntegerBy(n: Decimal.Value): Decimal;
+  divToInt(n: Decimal.Value): Decimal;
+
+  equals(n: Decimal.Value): boolean;
+  eq(n: Decimal.Value): boolean;
+
+  floor(): Decimal;
+
+  greaterThan(n: Decimal.Value): boolean;
+  gt(n: Decimal.Value): boolean;
+
+  greaterThanOrEqualTo(n: Decimal.Value): boolean;
+  gte(n: Decimal.Value): boolean;
+
+  hyperbolicCosine(): Decimal;
+  cosh(): Decimal;
+
+  hyperbolicSine(): Decimal;
+  sinh(): Decimal;
+
+  hyperbolicTangent(): Decimal;
+  tanh(): Decimal;
+
+  inverseCosine(): Decimal;
+  acos(): Decimal;
+
+  inverseHyperbolicCosine(): Decimal;
+  acosh(): Decimal;
+
+  inverseHyperbolicSine(): Decimal;
+  asinh(): Decimal;
+
+  inverseHyperbolicTangent(): Decimal;
+  atanh(): Decimal;
+
+  inverseSine(): Decimal;
+  asin(): Decimal;
+
+  inverseTangent(): Decimal;
+  atan(): Decimal;
+
+  isFinite(): boolean;
+
+  isInteger(): boolean;
+  isInt(): boolean;
+
+  isNaN(): boolean;
+
+  isNegative(): boolean;
+  isNeg(): boolean;
+
+  isPositive(): boolean;
+  isPos(): boolean;
+
+  isZero(): boolean;
+
+  lessThan(n: Decimal.Value): boolean;
+  lt(n: Decimal.Value): boolean;
+
+  lessThanOrEqualTo(n: Decimal.Value): boolean;
+  lte(n: Decimal.Value): boolean;
+
+  logarithm(n?: Decimal.Value): Decimal;
+  log(n?: Decimal.Value): Decimal;
+
+  minus(n: Decimal.Value): Decimal;
+  sub(n: Decimal.Value): Decimal;
+
+  modulo(n: Decimal.Value): Decimal;
+  mod(n: Decimal.Value): Decimal;
+
+  naturalExponential(): Decimal;
+  exp(): Decimal;
+
+  naturalLogarithm(): Decimal;
+  ln(): Decimal;
+
+  negated(): Decimal;
+  neg(): Decimal;
+
+  plus(n: Decimal.Value): Decimal;
+  add(n: Decimal.Value): Decimal;
+
+  precision(includeZeros?: boolean): number;
+  sd(includeZeros?: boolean): number;
+
+  round(): Decimal;
+
+  sine() : Decimal;
+  sin() : Decimal;
+
+  squareRoot(): Decimal;
+  sqrt(): Decimal;
+
+  tangent() : Decimal;
+  tan() : Decimal;
+
+  times(n: Decimal.Value): Decimal;
+  mul(n: Decimal.Value) : Decimal;
+
+  toBinary(significantDigits?: number): string;
+  toBinary(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toDecimalPlaces(decimalPlaces?: number): Decimal;
+  toDecimalPlaces(decimalPlaces: number, rounding: Decimal.Rounding): Decimal;
+  toDP(decimalPlaces?: number): Decimal;
+  toDP(decimalPlaces: number, rounding: Decimal.Rounding): Decimal;
+
+  toExponential(decimalPlaces?: number): string;
+  toExponential(decimalPlaces: number, rounding: Decimal.Rounding): string;
+
+  toFixed(decimalPlaces?: number): string;
+  toFixed(decimalPlaces: number, rounding: Decimal.Rounding): string;
+
+  toFraction(max_denominator?: Decimal.Value): Decimal[];
+
+  toHexadecimal(significantDigits?: number): string;
+  toHexadecimal(significantDigits: number, rounding: Decimal.Rounding): string;
+  toHex(significantDigits?: number): string;
+  toHex(significantDigits: number, rounding?: Decimal.Rounding): string;
+
+  toJSON(): string;
+
+  toNearest(n: Decimal.Value, rounding?: Decimal.Rounding): Decimal;
+
+  toNumber(): number;
+
+  toOctal(significantDigits?: number): string;
+  toOctal(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toPower(n: Decimal.Value): Decimal;
+  pow(n: Decimal.Value): Decimal;
+
+  toPrecision(significantDigits?: number): string;
+  toPrecision(significantDigits: number, rounding: Decimal.Rounding): string;
+
+  toSignificantDigits(significantDigits?: number): Decimal;
+  toSignificantDigits(significantDigits: number, rounding: Decimal.Rounding): Decimal;
+  toSD(significantDigits?: number): Decimal;
+  toSD(significantDigits: number, rounding: Decimal.Rounding): Decimal;
+
+  toString(): string;
+
+  truncated(): Decimal;
+  trunc(): Decimal;
+
+  valueOf(): string;
+
+  static abs(n: Decimal.Value): Decimal;
+  static acos(n: Decimal.Value): Decimal;
+  static acosh(n: Decimal.Value): Decimal;
+  static add(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static asin(n: Decimal.Value): Decimal;
+  static asinh(n: Decimal.Value): Decimal;
+  static atan(n: Decimal.Value): Decimal;
+  static atanh(n: Decimal.Value): Decimal;
+  static atan2(y: Decimal.Value, x: Decimal.Value): Decimal;
+  static cbrt(n: Decimal.Value): Decimal;
+  static ceil(n: Decimal.Value): Decimal;
+  static clamp(n: Decimal.Value, min: Decimal.Value, max: Decimal.Value): Decimal;
+  static clone(object?: Decimal.Config): Decimal.Constructor;
+  static config(object: Decimal.Config): Decimal.Constructor;
+  static cos(n: Decimal.Value): Decimal;
+  static cosh(n: Decimal.Value): Decimal;
+  static div(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static exp(n: Decimal.Value): Decimal;
+  static floor(n: Decimal.Value): Decimal;
+  static hypot(...n: Decimal.Value[]): Decimal;
+  static isDecimal(object: any): object is Decimal;
+  static ln(n: Decimal.Value): Decimal;
+  static log(n: Decimal.Value, base?: Decimal.Value): Decimal;
+  static log2(n: Decimal.Value): Decimal;
+  static log10(n: Decimal.Value): Decimal;
+  static max(...n: Decimal.Value[]): Decimal;
+  static min(...n: Decimal.Value[]): Decimal;
+  static mod(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static mul(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static noConflict(): Decimal.Constructor;   // Browser only
+  static pow(base: Decimal.Value, exponent: Decimal.Value): Decimal;
+  static random(significantDigits?: number): Decimal;
+  static round(n: Decimal.Value): Decimal;
+  static set(object: Decimal.Config): Decimal.Constructor;
+  static sign(n: Decimal.Value): number;
+  static sin(n: Decimal.Value): Decimal;
+  static sinh(n: Decimal.Value): Decimal;
+  static sqrt(n: Decimal.Value): Decimal;
+  static sub(x: Decimal.Value, y: Decimal.Value): Decimal;
+  static sum(...n: Decimal.Value[]): Decimal;
+  static tan(n: Decimal.Value): Decimal;
+  static tanh(n: Decimal.Value): Decimal;
+  static trunc(n: Decimal.Value): Decimal;
+
+  static readonly default?: Decimal.Constructor;
+  static readonly Decimal?: Decimal.Constructor;
+
+  static readonly precision: number;
+  static readonly rounding: Decimal.Rounding;
+  static readonly toExpNeg: number;
+  static readonly toExpPos: number;
+  static readonly minE: number;
+  static readonly maxE: number;
+  static readonly crypto: boolean;
+  static readonly modulo: Decimal.Modulo;
+
+  static readonly ROUND_UP: 0;
+  static readonly ROUND_DOWN: 1;
+  static readonly ROUND_CEIL: 2;
+  static readonly ROUND_FLOOR: 3;
+  static readonly ROUND_HALF_UP: 4;
+  static readonly ROUND_HALF_DOWN: 5;
+  static readonly ROUND_HALF_EVEN: 6;
+  static readonly ROUND_HALF_CEIL: 7;
+  static readonly ROUND_HALF_FLOOR: 8;
+  static readonly EUCLID: 9;
+}
+
+export declare function Decimal(n: Decimal.Value): Decimal;