No, I won't.
The reason I won't is simple: it's a very, very bad design for a database table, and it will give you huge problems in the future if you carry on that way.
While it is possible to do what you want, it's clumsy, and it makes other operations later a lot, lot more complicated.
Instead, change your DB design: add one or two other tables:
PurchasedItems Table:
id
custID (foreign key to id from Table1)
itemId (foreign key to id from Items table)
cost value of transaction as a numeric field
Items Table:
id
itemName (your x, or y, or a, or b)
description (free text description of the item)
Now when you want to fetch individual items it's pretty simple - and you can do math on the values a lot more simply as well.