A chain of paint store carries two brands of latex paint. Sales figures indicate that if the first brand it sold for x dollars per gallon and the second for y dollars per gallon, the demand for the first brand will be DI(x, y) 300 10x80y gallons per month and the demand for the second brand will be D2(x, y)- 400 90x- 10y gallons per month. 

(a) Express the chain of paint store's monthly revenue from the sale of paint as a function of x and y R(x, y): 700 +80%+70-y Reminders: 

1) Use the correct variables. 

2) Do not use blank spaces ever. 

3) Use the multiplication"" and division "" symbols correctly and consistently as needed. Submit Answer Incorrect. Tries 1/10 Previous Tries

(b) Compute the revenue from part (a) if the first brand it sold for S24 per gallon and the second for S18 per gallon.