Create a Joomla Template

Hi I Have a latest joomla running and have joomshopping 4.4.0 version on my website. I have a pdf invoice generator in joomshopping but problem is it only allows me to generate invoices for upto 25 orders at a same time. I would like to be able to generate atleast 100 invoices at a time. I get out of memory error when selected more then 25 invoices to generate at a time. I have a shared server and memory has been increased to max to generate the max number of invoices at a time. The system joomshipping is using take more memory to generate invoice. So i guess you will have to use a different way to generate a pdf invoice. You would have access to the testing website to make changes and once everything is successful then you will have to send me the files with instuructions to put them in a correct folder on actual website. I would like someone to complete this asap and not looking for someone who will waste my time.. Please only bid if you have an ability to complete this job. I can provide the ftp details for the testing website for you to have a look.