List with option for custom text

I have a custom sheet that requires alot of input each month. I am using a table and one of the columns requires the name of where purchases were made from. I use the same companies each month, but also have new ones that are one time deals. I want to be able to creat a list so that when i start typing the name in, it will use auto complete to save time. My problem is, that I am using a table and have the list in another part of the sheet.