Metro Hardware had a beginning inventory of $50,000 on January 1. During the month of January, net purchases amounted to $20,000 and net sales totaled $30,000. The company's normal gross profit rate is 40% of net sales. Using the gross profit method, Metro's estimated inventory at the end of January is: Select one: a. $62,000. b. $58,000. c. $54,000. d. $52,000