Task $2$: Customer$-$Level Analysis

Using the $$clean$$ dataset generated in the last step of Task $1,$ calculate the following metrics for each individual customer, then report the average across all customers. Do not round when calculating metrics for each individual customer, but rather round your final answer after averaging across customers.

Average Purchase Amount $($APA$)=$ Total revenue from the customer within a given time period $/$ number of purchase transactions made by the customer in the same time period $[$Use the last three fiscal years in the dataset as the time period. After averaging across customers, round final answer to the nearest whole dollar.$]$