Bill change should be working

Reduce quantity should be working.

bookie/src/app/sales/quantity/quantity.component.ts

@@ -2,6 +2,8 @@ import { Component, Inject, OnInit } from '@angular/core';
 import { FormBuilder, FormGroup } from '@angular/forms';
 import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material/dialog';
 
+import { MathService } from '../../shared/math.service';
+
 @Component({
   selector: 'app-quantity',
   templateUrl: './quantity.component.html',
@@ -14,6 +16,7 @@ export class QuantityComponent implements OnInit {
     public dialogRef: MatDialogRef<QuantityComponent>,
     @Inject(MAT_DIALOG_DATA) public data: number,
     private fb: FormBuilder,
+    private math: MathService,
   ) {
     this.createForm();
   }
@@ -31,7 +34,7 @@ export class QuantityComponent implements OnInit {
   }
 
   accept(): void {
-    const { quantity } = this.form.value;
+    const quantity = this.math.parseAmount(this.form.value.quantity);
     this.dialogRef.close(quantity);
   }
 }