I believe that GMV concept will be helpful in solving your problem. Gross Merchandise Value, also referred to as gross merchandise volume, is the total amount of sales a company makes over a specified period, typically measured quarterly or yearly. While Gross Merchandise Value can be useful for a company in terms of understanding how many items are being sold and the amount of revenue being generated from them, it ultimately provides unrefined data that does not really express the true value of the goods being sold or business profitability.
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