Laundry Cost

Have a weird question for you guys. Our varsity program pays my wife to launder the game jerseys and pants for our JV and Varsity squads. JV runs about 60-65 guys and varsity runs about 80-100 guys depending on home or away games each week. How would you calculate the pay on that? Flat rate? Per set of game cloth (jersey and pants)? Last year it was just a flat rate of $40 per trip, so about $80 a week. Last year was the first time the HC had payed someone to do this and her first time to do this as well.  It would take the coaches all weekend to get this much done with our 2 normal size washers and dryers. She would take them to a local laundry mat and the program would pay the quarters for the washers and dryers and the $40 for doing it. Just wanted to get some other opinions on if this was a good rate.