The Blue Lake Water Company has two departments, Purifying and Bottling. The Bottling Department received 76,000 liters from the Purifying Department. During the period, the Bottling Department completed 74,000 liters, including 3,000 liters of work in process at the beginning of the period. The ending work in process was 5,000 liters. How many liters were started and completed during the period?

side note the possible answers are : a. 71000 b. 74000 c. 73000 d. 72000