сделал так:
$param['data'][] = "
SELECT
shop_items_catalog_item_id as item_id,
shop_items_catalog_marking as item_num_in,
shop_items_catalog_name as item_name,
shop_vendorcode as vendor,
round((
(SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 3 AND shop_items_catalog_item_id = item_id) +
(SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 4 AND shop_items_catalog_item_id = item_id) +
(SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 5 AND shop_items_catalog_item_id = item_id)
),0) as total_count,
round((SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 4 AND shop_items_catalog_item_id = item_id),0) as bm,
round((SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 5 AND shop_items_catalog_item_id = item_id),0) as mm,
round((SELECT shop_warehouse_items_count FROM shop_warehouse_items_table WHERE shop_warehouse_id = 3 AND shop_items_catalog_item_id = item_id),0) as sklad,
(SELECT shop_prices_to_item_value FROM shop_prices_to_item_table WHERE shop_list_of_prices_id = 4 AND shop_items_catalog_item_id = item_id) as price_p,
(SELECT shop_prices_to_item_value FROM shop_prices_to_item_table WHERE shop_list_of_prices_id = 5 AND shop_items_catalog_item_id = item_id) as price_r
FROM `shop_items_catalog_table`
WHERE 1 {FILTER_STRING} {ORDER_STRING} {LIMIT}
";
$param['data'][] = "
SELECT
'' as item_id,
'' as item_num_in,
'Сумма' as item_name,
'' as vendor,
round(SUM(w2.shop_warehouse_items_count) + SUM(w3.shop_warehouse_items_count) + SUM(w4.shop_warehouse_items_count), 0) as total_count,
round(SUM(w2.shop_warehouse_items_count), 0) as bm,
round(SUM(w3.shop_warehouse_items_count), 0) as mm,
round(SUM(w4.shop_warehouse_items_count), 0) as sklad,
round(SUM(p1.shop_prices_to_item_value), 0) as price_p,
round(SUM(p2.shop_prices_to_item_value), 0) as price_r
FROM `shop_items_catalog_table` as i
LEFT JOIN shop_warehouse_items_table as w2 ON i.shop_items_catalog_item_id = w2.shop_items_catalog_item_id AND w2.shop_warehouse_id = 4
LEFT JOIN shop_warehouse_items_table as w3 ON i.shop_items_catalog_item_id = w3.shop_items_catalog_item_id AND w3.shop_warehouse_id = 5
LEFT JOIN shop_warehouse_items_table as w4 ON i.shop_items_catalog_item_id = w4.shop_items_catalog_item_id AND w4.shop_warehouse_id = 3
LEFT JOIN shop_prices_to_item_table as p1 ON i.shop_items_catalog_item_id = p1.shop_items_catalog_item_id AND p1.shop_list_of_prices_id = 4
LEFT JOIN shop_prices_to_item_table as p2 ON i.shop_items_catalog_item_id = p2.shop_items_catalog_item_id AND p2.shop_list_of_prices_id = 5
WHERE 1 {FILTER_STRING} LIMIT 1
";