In 2020, Quapau Products introduced a new line of hot water heaters that carry a one-year warranty against manufacturer's defects. Based on industry experience, warranty costs were expected to approximate 5% of sales revenue. First-year sales of the heaters were $220,000. An evaluation of the company's claims experience in late 2021 indicated that actual claims were less than expected-4% of sales rather than 5%. Assuming sales of the heaters in 2021 were $270,000 and warranty expenditures in 2021 totaled $8,800, what is the 2021 warranty expense? Warranty expense