Susan started a small business and purchased a printer that cost $60. The function f represents her total printing costs after one year, where x is the cost of one ink cartridge. Her brother Jason also started a business and purchased a printer. Including the cost of the printer, the function g represents his total printing costs after one year, where x is the cost of one ink cartridge.

When the two situations are represented by graphs, the graph of the second situation is the graph of the first situation, shifted up 12 units.

Determine the explicit function that defines the second situation.

A. g(x)=15x+72

B. g(x)=15x+12

C. g(x)=180x+720

D. g(x)=27x+60