Otterology has a software program that allows you to do a number of things like view your inventory on your mobile device, enter each cost per item to keep up with profits, add and adjust inventory online or with a spreadsheet upload, manage multiple locations' sales and inventory with one account, and run sales and profit reports by item, location, or category.
You can start the free 14-day trial and if you like it it's under $20 a month. You don't even need a credit card to try it out to see if you like it. But as a business owner myself, I know how important it is to have the right software in order to make your business easy to run and give you more freedom to handle other important tasks. Check it out - it's free to try and you may just change how you do business from now on.