Aterway Company uses a periodic inventory system. Details for the inventory account for the month of January, 2020 are as follows:

Units Per unit price Total
Balance, 1/1/20 190 $4.00 $760
Purchase, 1/15/20 170 5.10 867
Purchase, 1/28/20 170 5.60 952

An end of the month (1/31/20) inventory showed that 220 units were on hand. How many units did the company sell during January, 2020?

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.