A manufacturer has costs C(q) and revenues R(q) for producing a units.
The cost of producing 200 units is 2,958 dollars, and the marginal costs
at that production level is 9.2 dollars per unit. The revenue from
producing 200 units is 6,868 dollars, and the revenue at that production
level is decreasing by 2.7 per unit.
Estimate how many dollars is the profit when producing 204 units.