Hi,
I have reviewed the job and understood your requirements. I can develop the total money add according to number by product in add to cart, also customer detail in session and more functionality will be same as you mentioned I have developed every type of plugins functionality (around 500 ) like get images in grid format, location track according geo location, all near places show in map, duplicate data detect and more.
I am well experienced in customize/create custom plugins. I and my team highly specialized in Web design, Web development, SEO, Graphic design and Mobile apps with 5+ years experience.
If you have any query about functionality , may ask via freelancer messaging system and Skype.
We look forward to working with you.
Regards,
Rohit