I really like your plugin and I want to purchase the pro version but I have to know if the plugin is capable of meeting all of my site needs. I am offering fitness classes. The intro level is at $40, the beginners, intermediate, & advance levels are at $50 & the master class is at $60. It appears that the plugin will only be able to capture the cost per time slot for only one level under the PayPal Payment Configuration. Is there a way to setup cost per time slots for my other levels. Please advise. I hope so. I really want to get the pro version of this plugin. Thanks!