is it compaitable if remove cart page

I am using plugin to make the checkout in one page, so is this plugin could work with our case.

the user at our site, click on Add to cart and then convert direct to checkout page

also our checkout page contain more option that increase the price

could we able make as this scenario:
1. after user click add to cart
2. he will converted to checkout page
3. user choose all product option
4. choose payment method such as visa
5. could we add an option in checkout page that user will choose to make full payment or depoist with percentage value of amount