A printing company advertises business cards for professionals. Five hundred cards cost $9.90, and 1000 cards cost $11.90. Determine the mathematical model, assuming that any number of cards can be purchased.


f(x)=7.90 + 0.004 x

f(x)=9.70 + 4.00 x

f(x)=0.004 + 7.90 x

f(x)=4.00 + 9.70 x


A firm's fixed costs are $60. Variable costs are $3.50 per unit.

1)At what production level will costs be exactly equal to revenues?

2)What will profit equal?