Final answer:
The exact term for routinely purchasing the same product with similar terms of sale isn't specified, but it might be referred to as a routine purchase.
Step-by-step explanation:
When a business consistently purchases the same product under similar terms of sale, the term that is generally used is routine purchase. However, the exact phrase to fill in the blank is not provided in the question, which makes providing a definitive answer challenging. Economists may refer to a "good deal" on a product using terms such as consumer surplus, where the shopper is able to purchase a product for less than the maximum price they are willing to pay, hence gaining additional value.
Another related concept is tying sales, which is a scenario wherein a customer is allowed to buy one product only if the customer also buys another product. Tying sales can be controversial, as they may force consumers to purchase additional products that they might not want.
On the other hand, bundling is where a firm sells multiple products together for a better price, which can offer consumers a discount on the group of products compared to buying them separately.