Hello,
This request additional customization, because it is default woocommerce behavior for variable products and you will have the same result even with default WC theme – Storefront. Additional customization is outside the scope of our support (check the item support policy https://themeforest.net/page/item_support_policy ), but maybe this article will be useful for you https://www.xadapter.com/display-striked-price-variable-products-woocommerce-catalog-mode-wholesale-role-based-pricing/
Regards
