The grid has six of each of the letters 'S', 'I' and 'X' (not necessarily in order), from which the word 'SIX' can be formed six times.

If 'SIX' represents the number 6, then the sum of the value of the six of them and the seven occurrences of the number 6 is 78 (same as Monox D. I-Fly's answer in post #2).

This uses all grid entries.

]]>The only problem with that is that I don't think there's an S symbol for the Roman Numerals.

That's why I assumed they were supposed to be SIX.

]]>Unfortunately, that post is from over 10 years ago. We are not likely to get much further info from the OP.

]]>6 S I I I

6 6 S 6 S

X I S I X

X 6 S 6 X

Add All The Numbers

Could there be roman numerals thrown in

I think they want the total answer.

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