Discount on Total Purchase Calculation

A store is having a sale where customers can receive a discount based on the total amount of their purchase before tax. If a customer spends between $50 and $100, they receive a 10% discount. If they spend more than $100, they receive a 15% discount. A customer purchased three items priced at $25, $30, and $60. What is the total cost of their purchase after applying the discount and before tax?