Your electric bill is $136. You are charged 14% simple interest for late payments. How much do you owe if you pay the bill 1 month past the due date? (Round your answer to two decimal places.)

136 * 1.14 = 155.04 <==

or u can also do it this way..
136 + 0.14(136) = 136 + 19.04 = 155.04 <==