Hi, can you please explain how to solve this? I have solved it but I want to see if there is an easier way? Also, I was wondering if the question is asking for average fixed cost and variable cost per unit, or just for the 250 units?

Given a firms cost function C(Q) = 0.07Q3 - 10Q2+ 2100Q + 5500. the average fixed cost is and the average variable cost is when 250 units are produced. Q represents the number of units. Give your answers to the nearest whole number. Note: "Variable costs" are costs that depend on the number of units produced, and "fixed costs" are costs that are paid no matter how many units are sold. For example, in the cost function C(Q)=40+3, Variable cost is 4Q and the fixed cost is 3