Frazier has $1,200 in savings. He works because he is saving money for college, and he earns $9 an hour. If Frazier saves 25 percent of his net pay, after 20 percent is taken out for tax, identify the expression which represents Frazier's savings.A) 1.8x + 1,200 B) 3.6x + 1,200 C) 7.2x + 1,200 D) 9x + 1,200