Hazard Company began 2021 with a credit balance of $16.DOO in the refund account Sales and cash collections from customers during the year were $1750.000 and 51410.000, respectively. During 2021. customers returned merchandise for credit of $67000 to the accounts. The balance in the refund ability account at the end of 2021 was $136,500. What percent of sales in 2021 does Hazard estimate to be returned