Ok ... a bit of schooling in cost basis is in order ... if the broker that sold the stock doesn't have this info then you will need to do some computing yourself ... you will add up the original cost basis + all the reinvested dividends (that bought more stock) for a total of the cost basis of all the stock you sold.
For instance if you bought the original 100 shares for $1000 and then they paid out $100 in dividends per year which buys another 10 shares per year and this continues for 10 years you would have a total of 200 shares at a cost basis of $2000.
