Opencart extension compatibility/bug fix

Please make the following work together: ADD Product Cost and Profit Report - Sales Report - [login to view URL] Bootstrap admin shell - [login to view URL] vqmod - [login to view URL] Opencart - [login to view URL] As it is now, product cost, when editing a product is not appearing under the product data section. (although you can see the field has been added to the database) I receive this error: Notice: Undefined index: cost in /home/grahamst/public_html/vqmod/vqcache/[login to view URL] on line 132Warning: Cannot modify header information - headers already sent by (output started at /home/grahamst/public_html/admin/[login to view URL]) in /home/grahamst/public_html/vqmod/vqcache/[login to view URL] on line 28Warning: Cannot modify header information - headers already sent by (output started at /home/grahamst/public_html/admin/[login to view URL]) in /home/grahamst/public_html/vqmod/vqcache/[login to view URL] on line 29 I will give you ftp and admin access to the backend of opencart. Find the problem, create a fix, implement the fix. Once you have fixed the problem, document the changes you made.