Gray Company had an accounts receivable balance of 50,000 on December 31, 2019, and 75,000 on December 31, 2020. The company wrote off 20,000 of accounts receivable during 2020, and collected 3,000 on an account written off in 2018. Sales for the year 2020 totaled 620,000. All sales were on account. The amount collected from customers on accounts receivable during 2020 was