When will they finish and how much will it cost?
Suppose you hire three 3-toed sloths to build a tree fort. Typically 3-toed sloths work alone and advertise as such. The signs indicate how long it takes them to build a fort individually and how much they charge per hour (24 hours, $5/hr. 16 hours, $10/hr. 12 hours, $15/hr.) If these sloths start at noon and work together, when will they finish and how much will it cost to build a fort?