A. Percentage more than $77.89 per purchase?B. Less than $97.57 per purchase?

20 21 22 23 24 25 26 27 28 29 30 31 Average sales for an online textbook distributor were $68.05 per customer per purchase. Assume the sales are normally distributed. If the standard deviation of the amount spent on textbooks is $9.84, find the percentage of customers of the online textbook distributor that spent: (a) more than $77.89 per purchase. (b) less than $97.57 per purchase. Round your answer to the nearest tenth of a percent. Refer to the table of values ( Area Under the Standard Normal Distribution) as needed. Part: 0 / 2 Part 1 of 2 (a) The percentage of customers that spent more than $77.89 per purchase is% X