Turns out, paying to use a shopping cart might actually be worth it. Credit: Getty Images; EatingWell collageKey PointsAldi's cost-saving measures, like self-bagging and cart deposits, help keep prices low.Their private-label products are high-quality and more affordable than name-brand products.Simplified store setups and efficient stocking reduce labor costs, so customers save money.I noticed I was spending so much more money on groceries than…