A manufacturer of an electronic toy finds that the total daily cost c(x) of producing x toys per day is given by c(x)=500+5x+.001x^2
Each toy can be sold at a price p(in dollars) given by: p=21-.003x. If all the toys that are manufactured can be sold, find the daily level of production that will result in maximum profit.
all ive got so far is profit=21-.003x-(500+5x+.001x^2)
and for future reference how do i type my math problems on the computer and get all the signs that a regular keyboard doesn't have?