How to calculate sales retail price of item from code

    priceAgr = PriceDisc::findItemPriceAgreement(
                ModuleInventPurchSales::Sales, 
                retailInformationSubcodeTable.triggerCode,
                InventDim::find(InventDim::inventDimIdBlank()),
                inventTableModule.UnitId,
                SystemDateGet(),
                1,
                salesTable.CustAccount,
                salesTable.CurrencyCode,
                CustTable::find(salesTable.CustAccount).PriceGroup // salesTable.PriceGroupId
    );
    price = conPeek(priceAgr, 1);
    /*
    Price group can be 
    1. salesTable.PriceGroupId
    2. CustTable.PriceGroup
    3. from PriceDiscGroup table:
        salesTableExtended = salesTable.krfSalesTableExtended();
        if (salesTableExtended.RetailChannelTable)
        {
            while select RecId from retailChannelPriceGroup
                where retailChannelPriceGroup.RetailChannel == salesTableExtended.RetailChannelTable
                join GroupId from priceDiscGroup
                    where priceDiscGroup.RecId == retailChannelPriceGroup.PriceGroup
            {
                priceGroup += priceDiscGroup.GroupId;
            }
        }
    */
    
    // Retail price
    retailSalesTable    = salesTable.retailSalesTable();
    retailStoreId       = retailSalesTable.RetailStoreId;
    if (!retailStoreId)
    {
        select firstOnly StoreNumber from retailStoreTable
            where retailStoreTable.inventLocation   == salesTable.InventLocationId
                &&retailStoreTable.ChannelType      == RetailChannelType::RetailStore;
        retailStoreId = retailStoreTable.StoreNumber;
    }
    if (retailStoreId)
    {
        price = RetailPricingEngine::getRetailPriceByItem(retailStoreId, retailInformationSubcodeTable.triggerCode, inventTableModule.UnitId, InventDim::inventDimIdBlank(), DateTimeUtil::newDateTime(((salesTable.VKDiscountDate) ? salesTable.VKDiscountDate : SystemDateGet()), timeNow()), '');
    }

    // Simple varian, it requires SalesTable context. Does not create SalesLine but just using it to get all price related information
    salesLine.clear();
    salesLine.SalesId   = salesTable.SalesId;
    salesLine.ItemId    = 'ItemId';
    salesLine.SalesQty  = 1;
    salesLine.initFromInventTable(salesLine.inventTable());