<?php include "../../convenienceDB.php"; $salesNo = $_GET['salesNo']; $transactionNo = $_GET['transactionNo']; $ro = new convenienceDB(); $salesQTY = $ro->selectNow("convenience_sales", "qty", "salesNo", $salesNo); $inventoryNo = $ro->selectNow("convenience_sales", "inventoryNo", "salesNo", $salesNo); $newQTY = $ro->selectNow("convenienceInventory", "qty", "inventoryNo", $inventoryNo) + $salesQTY; $ro->editNow("convenienceInventory", "inventoryNo", $inventoryNo, "qty", $newQTY); $ro->deleteNow("convenience_sales", "salesNo", $salesNo); $ro->gotoPage("http://" . $ro->getMyUrl() . "/COCONUT/convenience/sales_output_update.php?transactionNo={$transactionNo}");