It costs a lot to fill a backpack — and even more this year than in 2020, according to reports. Prices on everything from school supplies to clothing are on the rise, according to a new KPMG survey. This back-to-school season, the average parent’s spending per student is expected to be as much as $270, compared with about $250 in 2020. Parents of preschoolers can expect to spend a whopping 32 percent more on back-to-school supplies, and college students aren't in the clear, either — their parents will spend about 13 percent more this year. Word is that while there's a...