Split Carts and Multi-Store Runs: When Extra Stops Beat One Inflated Basket

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A single Amazon cart is a tax on impatience. Splitting—pharmacy for the coupon, grocer for produce, online for the tracked SKU—only works if the extra trip is cheap.
A break-even rule
If splitting saves less than your time value plus fuel, do not split. If it saves $25 and you were already driving past both stores, split. Free-shipping thresholds that make you add junk are a split in disguise; see Free Shipping Thresholds.
How to split without chaos
Keep a running note of “buy here” by category. Do not add a third store for $4. Two is usually the maximum that still feels like a system.
Bottom line
Efficiency is total landed cost plus time. One inflated basket is not automatically simpler if it is full of filler.
