For the last few years, my sister & I have pooled our cash to purchase holiday gifts for family members. This year, she deposited my money into her checking account, went shopping then gave me a handful of receipts, telling me I now owe her more money. Some of these receipts include items she purchased for her friends, her boss or herself. And trying to figure out how much extra I owe her, after subtracting purchases not for the family, including sales tax, is making my head spin! This never happened when we used cash on these shopping trips. There has to be an easier way to figure this out. Any ideas or suggestions would be greatly appreciated!