A store selling art supplies finds that it can sell x sketch pads per week at p dollars each, according to the formula x = 2000

Question

A store selling art supplies finds that it can sell x sketch pads per week at p dollars each, according to the formula x = 2000 - 400p. Write formulas for R(p) and R(x). Then find the revenue obtained by selling the pads for $1.20 each.
R(p) = 
R(x) = 
R(1.20) =

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