<s>[INST] A local coffee shop is offering a seasonal promotion featuring a "designer flavor" of ice cream. The promotion is open to customers who have made a minimum of $250.00 in purchases at the shop during the past 3 months. Assume the promotion is open to all customers who meet this minimum purchase requirement. The coffee shop has a total of 1000 customers and the past 3-months' data shows that the number of customers who meet the $250.00 minimum purchase requirement is a random variable that follows a normal distribution with mean 300 and standard deviation 50. What is the percentage of the coffee shop's customer base who is eligible for this promotion?[/INST]