Write a Cost Function for the Problem $C(x)=1100 x+280$

Multiple Choice

Write a cost function for the problem. Assume that the relationship is linear.
-Fixed cost, $280; 10 items cost $5780 to produce

A) $C(x) =1100 x+280$
B) $C(x) =550 x+5780$
C) $C(x) =550 x+280$
D) $C(x) =1100 x+5780$