我很愿意慷慨解囊，但也不得不停下来考虑：要做六个月的花生酱果冻三文治，需要多少果冻才够呢?

• I wanted to be 7)beneficent in my gift-giving, but had to stop to think: Is there an equation that can determine how much jelly will supply peanut butter and jelly sandwiches for six months?