Balancing a firm's efforts in "push" (building and maintaining reseller and distribution support) and "pull" (generating customer demand) is an ongoing strategic concern for marketers.
[1] All-commodity volume measures a firm's ability to convey a product to its customers in terms of total sales among outlets carrying the brand.
[1] All-commodity volume (ACV) is a weighted measure of product availability, or distribution, based on total store sales.
Assuming a tool-set a company produces is only distributed in the second smaller-store chain, it is obviously represented in half the store locations (50%).
However, all stores are not created equal; based on the above numbers, the tool-set would only be selling in a quarter of the total market ACV (25%).