stations (id, name);
events (card, event, station_id, sum, timestamp)
SELECT `os`.`service_cost`
FROM `Org_services` AS `os`
JOIN `Organizations` AS `o` ON `o`.`ID` = `os`.`org_id` AND `o`.`org_name` = :orgName
JOIN `Services_list` AS `s` ON `s`.`ID` = `os`.`service_id` AND `s`.`service_name` = :servName