MySQL finding subtotals
问题 EDIT: I'm told that making you guys read means I get less attention. My apologies. Here's a simpler version: Bill got $100 dollars worth of items from a store. He wants to return enough of the items to get exactly $30 dollars back. The store has a Point of Return system that will help him do this. Here is the data after he scans his items: item ¦ price ¦ socks 4.00 cheap tv 22.00 book on tape 9.00 book on paper 7.00 party hats 3.00 picture frame 10.00 hammer 5.00 juicer 16.00 mysql guide 24