Using my Calculator

I was at the store, and I needed to use a calculator to make sure I had enough money for all the things I wanted to buy.  Usually I carry a calculator in my purse, but I must have taken it out before my trip to the store.  Last week I was looking at different T-Mobile Sony Ericsson Cell Phones, and I made sure I bought one that had a calculator on it.  I must have been foreshadowing that I was going to need it the next time I went to the store.  It was nice to pull up the calculator on my Sony Ericsson, and figure out if I had enough money.