A gym with about 150 check-ins a day
At one small workout towel per visit, about a quarter pound each, that is close to 40 lb of towels a day. Six pickups a week keep the bin from overflowing.
About 40 lb per pickup: $74.99
6 pickups a week: about $449.94
Next-day rate of $1.75/lb plus the service fee per order. The real weight is on the scale photo of each order.