You could have a property in vwDrugTable that stores the the selected row when the user selects it. Then, after that table view is removed and you are back in vwCalc just get the data from that property.
UITableView's -indexPathForSelectedRow method will allow you to determine which row is selected.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.