Lost black leather handbag with silver chain strap and keychains at Target in Billings.

I lost my black leather handbag with a silver chain strap at the Target in Billings last Saturday. It has a small pocket for a phone and a couple of keychains attached to the inside. I remember setting it down while I was checking out, but I didn't notice it missing until I got home. It's quite important to me as it holds my wallet and some sentimental items inside.