They will make an entry that is a debit to Cash and Credit Card Expense and a credit to Sales.
The first step is to calculate how much the credit card expense will be. $2,000 x .02 = $40.
Knowing that the credit card expense is $40, Appliance World will record an entry that is a debit to Cash for $1,960, a debit to Credit Card Expense for $40 and a credit to Sales for $2,000.