You can use an average cost calculator to determine the average share price you paid for a security with multiple buys. This can be handy when averaging in on a stock purchase or determining your cost basis. For more information on cost basis check out this investopedia article.
For a more robust tool you may find this Excel (.xls format) version handy: Cost Basis Calculator Excel. This was tested to work in both Microsoft Excel and Open Office.
Please note that the form below is just a very simple tool for quick cost basis calculating. You can find your average cost per share over 2 purchases.
You may also be interested in the capital gains calculator.Input your data below