The cost basis calculator can do in seconds what might otherwise take days. Simply by supplying the security, price paid, amount purchased, date of purchase and date of sale, the cost basis calculator can automatically produce the adjusted amount taking into account all splits, spin-offs, distributions and other amounts effecting corporate actions. In an instant, the cost basis calculator determines information for any security and over any holding period back to 1900. Evaluation Services Inc. has recently entered into a partnership with Xcitek to offer historical information with tax allocation factors, corporate actions, transfer/paying agents, and an exclusive cost basis calculator.