Lily goes to the supermarket. She has $60. She needs to buy 6 items: celery, cereal, bread, milk, potatoes, and coffee. She finds a stalk of celery for $5, cereal for 50% off $12, bread for $8, and milk for 10% off $10. She finds potatoes for $1 each and buys 6. How many dollars does she have left to spend on coffee?
Lily spends $5+$8=$13 on celery and bread.
Lily spends $12*(50/100)=$6 on cereal.
Lily gets 10% off the milk, so she pays 100% - 10% = 90% of its original price.
Lily spends $10*90%=$9 on milk.
She spends $1*6=$6 on potatoes.
Thus, she has $60-$13-$6-$9-$6=$26 left over for coffee.