using iomanip to nicely output all the data in a tabular format. you will need to calculate the total price for each product purchased by multiplying the price of each product by the quantity purchased, and then multiplying by the (tax rate 1). see the example output for formatting. b. keeping track of each total found and outputting the average total at the end of the table. c. keeping track of the count of unique customers and outputting the total unique customers at the end of the table.