It's a simple tax or tip calculator with a shopping list. You can lock or unlock the tax value on demand. If unlocked then the calculator is calculating the tax of the other two values. It has numerous settings to satisfy your needs. Items can be added or removed from the shopping list. Now you can also label the prices you have added to the shopping list, so you know exactly how much every item costs. When you're finished with shopping you can send the sum to the calculator and calculate the price including tax.
tax tip percent calculator shopping list label