On September $1,2023,$ Williams Home Decor sold $240$ lamps to Severson Builders at a price of $$50$ each $($cost $$31$ per set$).$ Williams allows the customer to return any unused lamps within $60$ days of purchase and estimates that $(1)10$ sets will be returned, $(2)$ the cost of recovering the products will be immaterial, and $(3)$ the returned lamps can be resold at a profit. On September $20,2023,$ Severson returned $7$ lamps and received a credit to its account and Williams still expects $3$ more to be returned.