If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 200 papers and 20% discount after first 1000 papers, how much will it cost to buy 2500 sheets of xerox paper? Choose the correct choice from the following answers
A) $125 B) $106 C) $135 D) $90 E) $100
30 sec approach - solve it using approximation   2500 sheet at full price, 5 cent = 125   2500 sheet at max discount price, 4 cent = 100   Your ans got to be between these two.   Ans $106 it is.
<result>B</result>
If xerox paper costs 5 cents a sheet and a buyer gets 10% discount on all xerox paper one buys after the first 200 papers and 20% discount after first 1000 papers, how much will it cost to buy 2500 sheets of xerox paper?