fix purchase order input bug

resources/assets/vue/components/bookings/forms/EditBookingAmountFormComponent.vue

@@ -10,9 +10,9 @@
                     </div>
                     <div class="row m-b-10">
                         <div class="col">
-                            <validation-wrapper-component :validator="$v.fix_amount">
+                            <validation-wrapper-component :validator="$v.parameters.fix_amount">
                                 <label class="muted">Booking Amount ({{parameters.fixed_currency.short_code}})</label>
-                                <input type="text" class="form-control" v-model="(Math.round((fix_amount+ Number.EPSILON) * 100) / 100).toFixed(2)" v-money="money">
+                                <input type="text" class="form-control" v-model="(Math.round((parameters.fix_amount + Number.EPSILON) * 100) / 100).toFixed(2)" v-money="money">
                             </validation-wrapper-component>
                         </div>
                     </div>
@@ -41,16 +41,16 @@
     export default {
         data(){
             return {
-                error: '',
-                fix_amount: (Math.round((this.data.amount + Number.EPSILON) * 100) / 100).toFixed(2),
+                error: ''
             }
         },
         validations: {
-            fix_amount: { required },
+            parameters: {
+                fix_amount: { required }
+            },
         },
         methods: {
             submitForm(){
-                this.parameters = {fix_amount: this.fix_amount},
                 this.submit(this.route('api.booking.booking_amount.update', this.data.id), 'put', this.section, true, true)
             },
             successHandler(){