Posted by Harold on .
A company manufactures and sells x cellphones per week. The weekly pricedemand and cost equations are given below P=400.5x and C(x)=20000+130x
What price should the company charge for the phones and how many phones should be produced to maximize the weekly revenue. What is maximum weekly Revenue?

calculus 
Steve,
revenue is sales*price
R(x) = x(400.5x) = 400x  .5x^2
dR/dx = 400  x
dR/dx = 0 when x = 400
R(400) = 400(400200) = 80000
Cost doesn't figure into revenue. Now, if you want profit, subtract cost from revenue.