On Thursday morning a bakery owner prepared by baking several pies decorating cupcakes. She spent 90 minutes baking the pies and an average 1.2 minutes decorating each cupcake. On Friday, she spent 58 minutes baking pies, and decorated the same number of cupcakes at an average of 17 minutes per cupcake. If she spent the same total amount of time preparing on Thursday as she did on Friday, how many cupcakes did she decorate each day?