Which formula should be used to determine the total cost math homework help

Which formula should be used to determine the total cost math homework help

The wedding photographer for the Smith/Jones wedding charges $1,000 for her preparation and first 60 prints. The cost is $2.00 per photo for photos beyond the first 60. Which formula should be used to determine the total cost, C, as a function of the number of photos, p, that are purchased, assuming at least 60 are purchased? 

a. C = 1000 p + 2 

b. C = 1000(2p – 60) 

c. C = 1000 + 2(p – 60)

Please explain your answer. Thanks!