Lizzy: Tilly needs to sell 100 bags at $10 per bag to make $300 in profit. How much did she buy each bag for?.
Me: Hmmm, let me think. I think this is the detailed solution:
User
Tilly will make 100 x $10 = $1000 in total. She has spent $1000 - $300 = $700 on 100 bags. Each bag cost Tilly $700 / 100 = $7. Final answer: 7.
Assistant