From Page 10 of 10Q - Revenue from product sal
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Revenue from product sales of Olaregen’s Excellagen® is recorded at the net sales price, or “transaction price,” which includes estimates of variable consideration that result from coupons, discounts, chargebacks and distributor fees, processing fees, as well as allowances for returns and government rebates.
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$857K revenue includes sales of excellagen at NET sales price...Joe gave $450K sales figure for excellagen's sale for November 2019 - I bet $450K was gross sales.