Deposit and monthly payments over 24 months + Interest

[seabell]

Hello
Virtuemart is an online shopping cart and one of the best around. Please look at the picture I have uploaded. I want to add exactly all of those features that you see. Was price, Now price, Price one has to pay monthly for 24 months, Deposit and total price after the 24 months payable at 21% interest. Is this possible?
Is there a template that does this or do I have to go into the code of virtuemart or is there a plugin one can purchase.
Thank you
Steve