The seasonal sales indexes for the Black Lab ski resort are 1.20 for January and .80 for December. If December sales in 1998 were $5,000, a reasonable estimate of sales in January 1999 is $7,500.
(1.20 * 5000) % .80 = 7,500.
Sales are actions related to selling or the number of products sold in a specific time period. A sale is also defined as the provision of a service for a fee. The seller, or the provider of the products or services, completes a sale in response to an acquisition, appropriation, requisition, or direct interaction with the customer at the point of sale. The item's title (property or ownership) is transferred, and a price is agreed upon. The seller, not the purchaser, normally executes the sale, and it may be done prior to the obligation of payment.
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