Show B2C price inc VAT & B2B price ex VAT

Hi there, I have set a dynamic rule  to show prices ex VAT but adding on to the cart as per the instructions in your docs and that all works great, but my client needs the B2C prices to show inc VAT. I have played with various filters but can't seem to isolate the B2C price and wondered if you could point me in the right direction to achieve this?

Thanks in advance, chris.

Cheers Stefan, almost perfect. Just had to add "wc_price( $retail_price )" instead of "$retail_price" to the output to add the currency. Thansk again.

add_filter('b2bking_filter_wholesale_price_final', function( $price, $text_retail_price, $retail_price, $text_final_price, $b2b_price_price, $product_id ){
    $product = wc_get_product($product_id);
    $retail_price = $product->get_price_including_tax();
    $price = '<span class="b2bking_both_prices_text b2bking_retail_price_text">'.$text_retail_price .'</span><span class="b2bking_both_prices_price b2bking_retail_price_price">'. wc_price( $retail_price ) . '<br></span><span class="b2bking_both_prices_text b2bking_b2b_price_price">'.$text_final_price.'</span><span class="b2bking_both_prices_price b2bking_b2b_price_price b2bking_b2b_price_id_'.esc_attr($product_id).'">'. $b2b_price_price .'</span>';
    return $price;
}, 10, 6);

Actually I have noticed this works when a variation is selected or pre selected but not when none are, any ideas? I would have thought that it would run through the same filter?

https://staging8.esmie.co.uk/product/2022-week-to-view-bouquet-spray-dark-blue/

It's the same for simple products, the RRP should be £3.50  : 

https://staging8.esmie.co.uk/product/greeting-card-thank-you-white-purple-blossom/

Many thanks Stefan, that seems to do the job, although not sure I fully understand the bit in the middle! I'll post the full function in case someone else wants to use it.

function b2bking_filter_wholesale_price_final_function( $price, $text_retail_price, $retail_price, $text_final_price, $b2b_price_price, $product_id ){
    $product = wc_get_product($product_id);
    if( $product->is_type('simple') ){
        $retail_price = wc_price( get_post_meta($product_id,'_regular_price', true) );
    } else if( $product->is_type('variable') ){
        $children = $product->get_children();
        $min_price = 0;
        $max_price = 0;
        foreach ($children as $variation_id){
            // get retail price
            $variation = wc_get_product($variation_id);
            $variation_price = get_post_meta($variation_id,'_regular_price', true);
            $variation_price_temp = get_post_meta($variation_id,'_sale_price', true);
            if (!empty($variation_price_temp)){
                // there is indeed a sale price
                $variation_price = $variation_price_temp;
            }
            if ($max_price === 0){
                $min_price = $max_price = $variation_price;
            } else {
                if ($variation_price < $min_price){
                    $min_price = $variation_price;
                }
                if ($variation_price > $max_price){
                    $max_price = $variation_price;
                }
            }
        }
        // if min and max prices are different, show range, else show the price
        if ($min_price !== $max_price){
            $retail_price = wc_format_price_range( $min_price, $max_price );
        } else {
            $retail_price = wc_price($min_price);
        }
    } else if (is_a($product,'WC_Product_Variation')){
        $retail_price = wc_price( get_post_meta($product_id,'_regular_price', true) );
    }
    
    $price = '<span class="b2bking_both_prices_text b2bking_retail_price_text">'. $text_retail_price .'</span><span class="b2bking_both_prices_price b2bking_retail_price_price">' . $retail_price . '<br></span><span class="b2bking_both_prices_text b2bking_b2b_price_price">'.$text_final_price.'</span><span class="b2bking_both_prices_price b2bking_b2b_price_price b2bking_b2b_price_id_' . esc_attr($product_id) .'">'. $b2b_price_price .'</span>';
    return $price;
}
add_filter( 'b2bking_filter_wholesale_price_final', 'b2bking_filter_wholesale_price_final_function', 10, 6 );

Ah ok, that makes sense, thanks. 

Ha ha, well that's handy as I like to know how it works if I can, so I can change it myself if need be. 

I bought this plugin for one simple function. Show incl. VAT for normal customers and show excl. VAT for B2B customers. 

Is there a simple howto? Or is this the wrong plugin for that?

All the other things on our shop are allready up and running including 2 customer groups.