It costs $0.25 to operate a clothes dryer for 10 minutes at a laundromat. What is the total cost to operate one clothes dryer for 30 minutes, a second for 40 minutes, and a third for 50 minutes?
  1. $3.25

  2. $3.00

  3. $2.75

  4. $2.00

  5. $1.20