547152 Paypal Button - Very Simple Project

For an order form, I need you to create a paypal subscription button based on selections made by visitor at my site. Client will come to my site. He will select Services. Basic service $10 Special service $20 Exclusive service $30 Very Exclusive service $40 From here, we will get price X to be shown in Price box in attached form. And if client select package A, then add $5 in price X If client select package B, then add $6 in price X. From here, we will get price Y to be shown in Price box in attached form. And If Client selects Plan A, then add $7 in price Y if client selects Plan B, then add $8 in price Y From here, we will get final price Z to be shown in Price box in attached form. Based on this Z value, I want paypal button created. By clicking this paypal button, visitor will be subscribing to pay me $Z at every 7 days. Please note, all these prices are given to help you understand requirement. These are not real prices. I should be able to change these prices at my end. And I dont want paypal button to be encrypted. I need it in simple html so that I may be able to change it as and when I need it. Once visitor clicks paypal button, 2 things should happen. A. paypal subscription should start B. all this data (name, email, etc) should reach to me at my email id.