RewarDing FoR CorreCt AnsWer The mean number of stereos sold per day at a store for 7 days was 18. Which statement must be true about the stereo sales at the store?

The store sold 25 stereos for the 7 days.

The store sold 126 stereos for the 7 days.

The store sold 18 stereos on at least half of the 7 days.

The store sold 18 stereos on at least two of the days.

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 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?