create wordpress page to add woocommerce product in a simple way

I need help creating a simple submit product page, to let a registred user to publish a product, User can add a product to store in this page, I've created 2 custom fields for product, in wp_postmeta one is called Amount "amount' the other is called Rate exchange "rate_exchange" in this creation page user is asked to choose a category put number in the "amount" field and "rate exchange" field And that's all clic on submit, I need the product price (_regular_price ) to be calculated this way: regular price= amount * rate exchange and also product title to be generated like this: $amount $product category $_regular_price I've been using a plugin called WP User frontend that let me create customized product submit forms, it allow adding HTML code also allow adding function, but I dont know how to auto generate product title and product price Please see attached screenshot of the form im trying to build