56. The price of a calculator at Vizquel Office Supply dropped from $49.95 to $38.95. What was the percent of decrease in price?

58. Jackie Morgan flund an antique chair in her attic. It was orginally purchased for $2.50. The chair is now worth $1,250. What is the percent of increase?

60. This year the price of an inkjet printer rose to $359. This is an increase of 15% more than last year's price. What was the old selling price? (Round to the nearest cent)