How to enable zero-dollar price items for multiple items added into the cart?

Summary:

From the storefront of one of our stores, we have a number of products. We are adding quantities of each product and clicking the "Add to Cart" button. We are trying to add multiple zero-dollar items to the cart at once. However, the out-of-the-box (cart.js) JavaScript has a validation that only allows non-zero dollar items.

It is comes under Oracle CX Cloud's Commerce application (saas).

I am using Oracle Commerce Cloud (SaaS) for my storefront.

problem:

I am facing an issue where I am unable to add multiple zero-dollar price items to the cart at once. When I try to add more than one zero-dollar item, it is not added into the cart.