is a cell boldface

I'm looking for a function to determine if a cell is formatted **bold**. I'm using LibreOffice Calc, and for ease of use, I have a range of items to buy and their prices. I want to have a simple method of marking an item as being bought. Rather than highlight the cell, hit F2, Home, and *, e.g., I'd like to be able to just highlight a cell (or range) and hit Ctrl-B. But I'm not locating a function to do this. I appreciate your help.