Help required in making column value dynamic

Hi ,

I need some help from genius minds. I am using a simple example to eleborate my problem.

I have created a table with one column, which has some values (e.g. Orange, Apple and Banana). Apart from this, I have three columns in my main dataset which represent expiry dates of each fruit type. Now I am planning to create another column which should  have expiry date of selected fruit type only. In other words, I am looking have a column with dynamic values.

Please suggest how to do this.

Many thanks for help in advance