A company has fixed costs of $ 28000 and variable costs of 0.4x +222 dollars per unit, where x is the total number of units produced. Also, the selling price of its product is 1250-0.6x dollars per unit.
1. Write the total cost function C(x)
2. .Write the total revenue function R(x)
3. Write the total profit function R(x)-C(x)
4. Find the break even point(s). R(x) = C(x)