If you want to learn how to be insanely efficient with coupon clipping and watching for sales, follow Kathy Spencer and learn from the master. WCVB TV in Boston notes that Spencer manages to spend only $4 on average each week to feed her husband, four kids, and four pets. We carefully re-read the pets line to make sure there was no past tense involved, as this would suggest cheating on where the food comes from. But nope, they’re still around, so it looks like she really is good with coupons and sales.