Change the number of columns on the shop home page

I am trying to change the number of columns categories are displayed on the home page of my EShop site. Right now, it has my categories in a column of 3, but I have 4 categories. The 4th one floats on a line by itself. How can I change the home page layout so it's 2 columns in stead of 3?
Thank you for your help.

Hello Della,

This requires a small modification to EShop layout. Please submit a new ticket to EShop category to send me the site information so our support staff can help you to implement that.

Sincerely, Giang

Hello,
I posted in the forum you mentioned: joomdonation.com/forum/eshop/50064-chang...-shop-home-page.html
Can you please help?

No, please go to joomdonation.com/support-tickets.html to submit a new ticket to EShop category there so I can help.
Sincerely, Giang