Jane has a checkbook balance of $68.00. she then writes two checks, one for $5.00 and one for $62.50. she also deposits $75.00. she then uses her calculator to determine her new balance. which of the following is the correct series of keys she should press?

a. 6 8 + 7 5 – 5 – 6 2 . 5 0
b. 6 8 + 7 5 – 6 2 5 0 – 5 =
c. on/c 6 8 – 5 – 6 2 . 5 0 + 7 5 =
d. on/c 6 8 + 7 5 = 5 = 6 2 . 5 0