Sheridan's Piano Service, Inc. is trying to establish the standard labor cost of tuning a typical piano. The following data have been collected from time and motion studies conducted over the past three months. (a) * Your answer is incorrect. Determine the standard direct labor hour per each piano that is tuned. (Round your intermediate. calculations and final answer to 2 decimal places, e.g. 15.25.) Standard direct labor hour hours You have been given the following information about the production of Lisa Co., and are asked to provide the factory manager with information for a meeting with the vice president of operations. The following is a variance report for the most recent period of operations. (a) How many units were produced during the period