Im so lost pls help me with this ASAP

its other services, GreenLawns obtained the following estimate of the relationship between sales and the amount spent on promotion in these two media. 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. Formulate an optimization problem that can be solved to maximize sales subject to the media budget of spending no more than $3,500 on total advertising. Determine the optimal amount to spend (in dollars) on radio and direct-mail advertising. (Round your answers to the nearest dollar.) radio R=$ direct-mail M=$ How much money (in dollars) will be generated in sales? (Round your answer to the nearest dollar.) Total sales S=$