$.post('{YOUR_URL}', $(form).serialize(), function(r){
location.href = '{ROBOKASSA_URL}?order_id=' + r.order_id;
// или
$(robokassa_form).find('input[name="order_id"]').val( r.order_id );
$(robokassa_form).submit();
}, 'json');
SELECT t.`name`, SUM(t.`money`) as `cash`, (SELECT SUM(`money`) FROM `table` WHERE `paymentType`='credit' AND `name`=t.`name`) as `credit` FROM `table` t WHERE t.`paymenType`='cash' GROUP BY t.`name`