Do that and fail.
Last month I decided to test Walmart's online purchasing and delivery. The nearest Supercenter is 3 miles away, which I visit quite often.
I ordered 8 non-food items from household, clothing and garden, no item more than $20. Delivery was "free".
Each and every item was delivered on a different, separate day. The first arrived on the fourth day after the order, the last took sixteen days from order to delivery. Whatever razor-thin margin Walmart had on the items was more than eaten up by the cost of eight separate deliveries.