Each of the 4 transactions should be defined in its own function. At the end you should have a minimum of 5 functions (including main). You may define additional functions as you see fit. The customer may purchase multiple of that item but not more than the available quantity on hand. All purchases are made with store credit; therefore, the user cannot purchase items exceeding their store credit. There is a 6% sales tax on all items. Customers are granted pre-tax discounts on purchases over specified amounts. The table below describes the discount rate based on membership level. Any incorrect transactions will display an appropriate error message. After the purchase is complete, show all details in a receipt format, including the updated credit balance.
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