13. A rm produces and sells two types of items each week. X number at of type A and "f number of type B. The weekly revenue and cost functions in dollars are Rim) = 3 x + 90y + 0.04;}: (11:15.1:2 0.053;? C(x,y) = 8n: + 6y + 2000i} 3. Find and interpret Pxfl 2136,1300} In. Find and interpret PylJ 300)