Scheduling a promotional discount

The Divvy Marketing team wants to run a promotional campaign to increase customer purchases, which internally they have called the Two by Two Discount. The Two by Two Discount restricts the promotion to the two overall lowest riding days for customers and then the two lowest windows of time (excluding the night window, 12am-6am). Remember there are two types of users: customers and subscribers.

If you lost progress, load the workbook 1_10_promo.twbx from the Workbooks folder on the Desktop.