Happy Snacks Ltd. (HSL) is a distributor of snack products to various retail stores in Toronto. HSL establishes agreements with stores whereby it places racks in the stores that display HSL's products. HSL is responsible for stocking and maintaining the racks. The retail merchant doesn't pay for the snacks until they are sold to a customer and earns a commission for any snacks sold. Each week an HSL representative visits the stores to replenish the racks and count the number of units that have been sold. The merchant pays HSL monthly for any snacks sold during the month, less commission. The merchant is responsible for snacks that are lost, stolen, or damaged during the month.

Required:
When should Happy Snacks recognize the revenue from the sale of snacks?