Please help in solving the answers that have a Red Cross in-front of them! Thank you!

GreenLawns provides a lawn fertilizing and weed control service. The company is adding a special aeration treatment as a low-cost extra service option, which it hop Management is planning to promote this new service in two media: radio and direct-mail advertising. A media budget of $2,500 is available for this promotional cam promoting its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two S=2R210M28RM+18R+34M where S= total sales in thousands of dollars R= thousands of dollars spent on radio advertising M= thousands of dollars spent on direct-mail advertising GreenLawns would like to develop a promotional strategy that will lead to maximum sales subject to the restriction provided by the media budget. (a) What is the value of sales (in dollars) if $2,000 is spent on radio advertising and $500 is spent on direct-mail advertising? S=$ (b) Formulate an optimization problem that can be solved to maximize sales subject to the media budget of spending no more than $2,500 on total advering. Maxs.t.R,M0 (c) Determine the optimal amount to spend (in dollars) on radio and direct-mail advertising. (Round your answers to the nearest dollar.) radio R=$ direct-mail M=$ How much money (in dollars) will be generated in sales? (Round your answer to the nearest dollar.) Total sales S=$