Amount Payment for woocommcere checkouts

Adds a amount payment field to the checkout page.

1. Install and activate plugin.
2. Add a product.
3. Settings->Amount Payment.
4. Select product you want to use to add to cart.
5. Create a link in the menu editor and add .add_to_cart_payment. 6.Create a page for the checkout and add the shortcode [woocommerce_checkout]