Keeping accurate records of costs has never been easier or faster. No more trying to figure out an accurate cost when your supplier's pricing fluctuates. An example is as follows:

You purchase 10 widgets for $10.00 each and sell 5. You order and receive 5 additional widgets from your supplier at the unit of cost of $5. When you add the 5 widgets at a cost of $5.00 each, your inventory is adjusted to 10 widgets at a unit cost of $7.50. Thus, your inventory is properly valued without the need of a calculator.