Bo has $500 in his savings account. he plans to add $150 to his savings account every month. recently, he purchased a tractor to use on his farm for $4,000. he plans to pay off the total price of the tractor over time by paying $200 a month. how much will bo have in savings when he can pay off the tractor in full?
a. $2,000
b. $2,050
c. $2,100
d. $2,150