9. 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. [on/c] [68] [+] [75] [=] [5] [=] [62.50] [=] b. [68] [+] [75] [–] [62.50] [–] [5] [=] c. [on/c] [68] [–] [5] [–] [62.50] [+] [75] [=] d. [68] [+] [75] [–] [5] [–] [62.50] [=]