Fix PHP form processing page

htttp://[login to view URL] When an order is placed, customers have the option to enter a customer coupon code. Upon using the BAM07 coupon code, the customer is supposed to receive a free bamboo comb and cutting board. Instead, the price of the entire order is reduced to a zero cost. This is reproducible by ordering any product, and entering the BAM07 coupon code. Steps to include to reproduce: 1.) Choose My Cart 2.) Enter item code, such as 1001M, and quantity. 3.) Add to cart 4.) Enter bam07 in the 'enter a coupon code' field. 5.) Press the apply button. ## Deliverables Code is available to view upon request.