###Human: Frank's laundry detergent is double concentrated and will wash 80 loads of laundry.  His detergent is usually $25.00 a bottle but they're having a sale.  If he buys 2 bottles, both bottles will drop to $20.00 a bottle.  How much does he spend, in cents, per load of laundry, if he buys 2 bottles of detergent?, ### Assistant: If he buys 2 bottles, the price drops to $20.00 per bottle so they cost 2*20 = $40.00
He can get 80 loads of laundry per bottle and he bought 2 bottles so that's 80*2 = 160 loads of laundry
The detergent cost $40.00 and he will be able to wash 160 loads of laundry so each load costs 40/160 = $0.25 
 So the answer is :  25