3 guys are at a hotel and order a pizza. Front desk says it will be $30, so each guy puts in $10. When it's delivered the pizza delivery guy says it is only $25, so he gives each guy back $1 and keeps $2 for a tip. If each guy got a dollar back, they only spent $9 each.
- $9 x 3 = $27
- Tip = $2
- $27 + $2 = $29