$sql = "UPDATE ".TB_PREF."purch_order_details
SET quantity_received = quantity_received + $entered_grn->this_quantity_inv,
+ quantity_ordered = quantity_ordered + $entered_grn->this_quantity_inv,
+ qty_invoiced = qty_invoiced + $entered_grn->this_quantity_inv,
std_cost_unit=$mcost,
act_price=$entered_grn->chg_price
WHERE po_detail_item = ".$myrow["po_detail_item"];