uthpala

cost for 0 copy to 20 copy =$ 1 cost for 21 copy to 100 copy = 0.04*80 =$ 3.2 cost for 101 copy to 200 copy) = 0.03*100 =$ 3 then cost for 0 copy to 100 copy must be 4.2 dollars and the total cost for 200 copies must be 7.2 dollars. thus => (y- 7.2)/(x-20...