The pricing bundle is the kernel of management of price system for OroCommerce B2B . In frontend  the price get showed by system layout based on service :

 
    oro_pricing.layout.data_provider.frontend_product_prices:
        class: 'Oro\Bundle\PricingBundle\Layout\DataProvider\FrontendProductPricesProvider'
        arguments:
            - '@oro_pricing.model.product_price_scope_criteria_request_handler'
            - '@oro_product.provider.product_variant_availability_provider'
            - '@oro_pricing.user_currency_manager'
            - '@oro_pricing.formatter.product_price_formatter'
            - '@oro_pricing.provider.product_price'
        tags:
            - { name: layout.data_provider, alias: frontend_product_prices }
 

This service is layout provider which give you the ability to get price list of specific product , the process of rendering price for top selling products fro example starts by importing oro_product_list which import   oro_product_list_item so to customization of this path you can find :
vendor/oro/commerce/src/Oro/Bundle/PricingBundle/Resources/views/layouts/blank/imports/oro_product_list_item/price.yml which contain:

 
layout:
    imports:
        -
            id: oro_product_price
            root: __product_secondary_content_first_container
    actions: []
 

is responsible to render the price of every item on to selling if you go to explore oro_product_price you will find the content:

 
layout:
    actions:
        - '@setBlockTheme':
            themes: 'OroPricingBundle:layouts:blank/imports/oro_product_price/oro_product_price.html.twig'
        - '@addTree':
            items:
                __product_price_container:
                    blockType: product_prices
                    options:
                        productPrices: '=product ? data["frontend_product_prices"].getByProduct(product) : []'
                        attributeFamily: '=context.offsetExists("attribute_family") ? context["attribute_family"] : null'
                        isPriceUnitsVisible: '=product ? data["oro_price_unit_visibility"].isPriceUnitsVisibleByProduct(product) : true'
 

So you can now explore that  layout provider frontend_product_prices used to get price list of the current item :
 productPrices: '=product ? data["frontend_product_prices"].getByProduct(product) : []'

if you go to class  Oro\Bundle\PricingBundle\Layout\DataProvider\FrontendProductPricesProvider and explore the function :

 
    public function getByProducts($products)
    {
        $this->prepareAndSetProductsPrices($products);
        $productPrices = [];
        foreach ($products as $product) {
            $productId = $product->getId();
            if ($this->productPrices[$productId]) {
                $productPrices[$productId] = $this->getProductPrices($productId);
            }
        }
        return $productPrices;
    }
 

You get the combined price list of current product. 

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