fix: display adjustment in minues

packages/server/src/models/Bill.ts

@@ -136,7 +136,7 @@ export default class Bill extends mixin(TenantModel, [
 
     return R.compose(
       R.add(adjustmentAmount),
-      R.subtract(this.discountAmount),
+      R.subtract(R.__, this.discountAmount),
       R.when(R.always(this.isInclusiveTax), R.add(this.taxAmountWithheld))
     )(this.subtotal);
   }

packages/server/src/models/SaleReceipt.ts

@@ -49,6 +49,9 @@ export default class SaleReceipt extends mixin(TenantModel, [
       'total',
       'totalLocal',
 
+      'adjustment',
+      'adjustmentLocal',
+
       'discountAmount',
       'discountPercentage',
 
@@ -119,6 +122,14 @@ export default class SaleReceipt extends mixin(TenantModel, [
     return this.total * this.exchangeRate;
   }
 
+  /**
+   * Adjustment amount in local currency.
+   * @returns {number}
+   */
+  get adjustmentLocal() {
+    return this.adjustment * this.exchangeRate;
+  }
+
   /**
    * Detarmine whether the sale receipt closed.
    * @return {boolean}