Point of Sale (POS) tablet application for ipad and android

Hello freelancers I have a company sells some items. These items are listed in a common XLS (excel) file, with the usual fields like ID, SKU, Description, Category, Price. I have a sales crew that visits stores so i want an application that can be run without internet, and work like a small eshop, for example, to scroll around the whole catalog items, or can search and press a quantity next to it (+/-) and pressing ADD will add to a basket. Of course i can adjust the items in basket like quantity or remove an item if i changed my mind. When the salesperson is done, can SEND through the mail mechanism of ipad/android the items selected in basket in text and then a messagebox appears to CLEAR or REMAIN with that basket and we can start over or adjust current selections for the next email/customer/order. No saves of orders, no history, no difficulties because we want to make them EASY LIKE A POS (point of sale) if you got my idea. We dont want to save the baskets, just send them to the email inserted. Of course a mechanism should work with an admin user/pass to update the xls file from internet location where the XLS is stored and will download to the tablet to work with it. Winning freelancer must provide me a TOTAL PRICE for BOTH projects (android and ipad) and must be compatible with latest operating systems accordingly. KEEP IN MIND that IF I DECIDE to select from the freelancer to make ONLY IPAD applcation (and not android at all), will have to adjust the price for that work only and will accepted only for that. I hope to do both but i will let you know In brief the project : 1. easy navigation 2. easy add/remove item to basket or adjust quantity 3. adjust basket (remove item or update quantities) 4. send basket to email 5. message to clear or not basket 6. easy mechanism of how to update the items in catalog 7. not fancy artwork - just clear and sharp