I need help inderstanding why the answer is 11400

Feb. 3: Hilton sold $12,000 of craft supplies on account, credit terms are 5/10, 1/30, to Quinn's Quilts. Cost of goods is $3,000, Begin by preparing the entry to Joumalize the sale portion of the transaction. Do not record the expense related to the sale. We will do that in the following step Accounts Debit Accounts Receivable-Quinn's Quilts 11.400 Sales Revenue Date Credit Feb 3 11.400