Data entry into online store

I need products entered into an on-line store. The store uses OSCommerce shopping cart. Previous experience in OScommerce is an advantage, but if not, it's a case of filling in the data in an online form. The data is currently on excel spreadsheets and needs copying from there and pasting into the product entry page. For each product we need the following info completed: Product name Product description meta title (a same as product name) Meta description (same for every product) The data cannot be exported from excel as it's not in a consistent format so please don't bid on the assumption that you can just export data, manipulate a csv and then import in one go, because that won't work. You would be required for regular work as there are appropriately 200-400 new products to be added on a monthly basis.