A credit card company has a cash back option for their customers which is based on the annual amount that they charge on their credit cards. The customer receives 1% cash on their first $5000 of purchase, 2% on the next $5000 of purchase and a 3% on cash back on portion that exceeds $10,000. If a customer receives a cash back of 2.2% on their total annual charges made on the credit card, then what was the customer's annual charge? Select.
A) $13,750	B) $15,000	C) $16,250	D) $17,500	E) $18,750
The customer receives $50 for the first $5000.   The customer receives $100 for the next $5000.   Let x be the total amount of the customer's annual charge.   $150 + 0.03(x-10,000)=0.022x   0.008x=150   x=18,750   The answer is $18,750.
<result>E</result>
A credit card company has a cash back option for their customers which is based on the annual amount that they charge on their credit cards. The customer receives 1% cash on their first $5000 of purchase, 2% on the next $5000 of purchase and a 3% on cash back on portion that exceeds $10,000. If a customer receives a cash back of 2.2% on their total annual charges made on the credit card, then what was the customer's annual charge?