A manufacturer buys bolts from a supplier. The bolts cost $0.17 each, but the manufacturer made a deal with the supplier and gets 4,000 bolts for $595.50. To the nearest cent, how much money does the manufacturer save on 4,000 bolts with this deal?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?