The table has a mix of fragments and full sentences. I'm concerned that if I have full stops after the sentences and none after the fragments it will look inconsistent to the reader.
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Your instincts are correct.
In bulleted lists, as in tables and spreadsheets, the word is consistency. Unfortunately, there is no hard and fast rule - it is a stylistic choice.
That said, most writers do not put full stops at the end of each list item unless each and every item is a full sentence. Even if they are full sentences, some style manuals dictate no full stops anyway.
As yours are not all full sentences, leave out the full stops on all items.
The actual content and design you are seeking will be the deciding most factor in implementing a solution. However, you may consider:
Consistency is the important thing. After that it is a matter of choice. All full stops or no full stops at all, even after full sentences. Eli Sluszny