The marginal cost function of producing a toy is given by C'(q)= 1000-20q (where q is the quantity)

a. If the fixed costs are $3000 what is the total cost to produce 10 items? 5 items?

b. If the fixed costs are $4000 and the toys are sold for $700 each, what is the breakeven point or the point where the total profit equals zero dollars