[ ] Display all coupon_list data from all Sales Invoices of the current shift. (CashWithdrawal.vue)
Fields: Coupon Name, Current Quantity, Quantity to be withdrawn, Sales Invoice #, Discounted Amount
[ ] Calculate total Discounted amount for coupon invoices WITH quantity (to be withdrawn).
[ ] Save data to POS Opening Shift Withdrawal Coupon Details.
[ ] Display all coupon_list data from all Sales Invoices of the current shift. (CashWithdrawal.vue) Fields: Coupon Name, Current Quantity, Quantity to be withdrawn, Sales Invoice #, Discounted Amount
[ ] Calculate total Discounted amount for coupon invoices WITH quantity (to be withdrawn).
[ ] Save data to POS Opening Shift Withdrawal Coupon Details.