Mateo is buying a new pair of headphones from an electronic store. The headphones cost $15.50, but Mateo has a coupon that will reduce the price by $4.00. He must pay 6% sales tax on the discounted price of the headphones. How much will Mateo pay in total for the headphones, including the tax?
A. $4.93
B. $12.19
C. $12.43
D. $16.43