###Human: At a laundromat, it costs $4 for a washer and a quarter for every 10 minutes in the dryer. Samantha does 2 loads of laundry in the wash and then divides all the washed clothes equally into 3 separate dryers. If she lets the dryers run for 40 minutes each, how much does she spend altogether?, ### Assistant: Samantha spends $4 x 2 = $8 on washing.
Each dryer costs 25 x 4 = 100 cents = $1
Three dryers cost 1 x 3 = $3
Altogether, she spends 8 + 3 = $11 
 So the answer is :  11