Final answer:
Appliance retailers employ the concept of seasonal discounts when they discount barbecue grills and air conditioners in the winter months to compensate for the drop in sales. This pricing strategy helps stimulate demand and increase sales volume.
Step-by-step explanation:
When appliance retailers discount barbecue grills and air conditioners in the winter months to compensate for the usual drop in sales, they are employing the concept of seasonal discounts. Seasonal discounts are a pricing strategy used by businesses to stimulate demand during periods of lower sales. By offering lower prices on these products during the winter months, retailers can attract customers who are looking for a bargain and increase their sales volume.