17 points for anyone who can solve all these 1) a certain retailer of toys marks merchandise up 40% from what they pay for it. in other words, if they pay $2.00 for a toy, they charge $2.80 for it. they charge $47.95 for a model train set. how much did it cost the retail store? 2) darren loaned money to a coworker for two years at 15% interest. it was an $825 loan. how much money will the coworker have to pay back at the end of the two years? 3) a certain retailer of hair supplies marks merchandise up 160% from what they pay for it. in other words, if they pay $20.00 for a bottle of hair product, they charge $52.00 for it. they charge $63.18 for a color maintenance kit. how much did it cost the retail store?