How to change number of category boxes/per row.

Currently, my beta theme displays four categories boxes per row on the home page. How can I change that to a different number of boxes per row?

@Cephas
Try to edit width in this row of style.css:
#home-cat a

Thank you. I will try that.

I tried that. It did change the number of category boxes, but the max per row was 5 and I wanted 8 because there is so much space around each row. If there is any other suggestion, I will appreciate it. If not, I can work with the current setting.

@Cephas
Not sure what you've tried, just do i.e
body #home-cat a {width:100px;margin-left:1px;margin-right:1px;}

Thank you very much. Your first suggestion worked. I did a mistake when I tried it the first time. Now I have all 8 categories on the same row and everything looks good. I appreciate your help.