Use a coupon stack to cash in on groceries at Walmart. (What is a coupon stack?) The family size box of General Mills Apple Cinnamon Toast Crunch is $3.62 in the store. Print a manufacturer coupon from Coupons.com and present it at checkout to pay $2.62. Then scan your receipt to Ibotta after purchasing to receive another $1.00 credit. The final price for a family size box will be only $1.62! Check out more great cereal deals.