Add product / variation to cart with custom price.

Hello all,

Im trying to add a product to the cart via ajax with a custom price.

var cprice = 10.00;

$.ajax({
	  url: WC_VARIATION_ADD_TO_CART.ajax_url,
	  data: {
			"action" : "woocommerce_add_variation_to_cart",
			"product_id" : "1",
			"variation_id" : "4",
			"quantity" : 1,
			"variation" : {
				"price": cprice,
			},
		type: "POST"
		}   
  });

the price is calculated from a popup modal and then sent to a function that adds sends the variation to the cart. But ideally I want to send it via ajax with a custom price if possible.