У вашего броузера проблема в совместимости с HTML5
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You can add text to the numerical value in Microsoft Excel and Excel will still treat it as a number with which you can use all functions like sum, etc. This is useful in situations like when you wish to see your inventory as '120 Kg' or '12 doz', etc or when you deal in foreign exchange.
http://www.youtube.com/watch?v=VEuq3nl7880
Details at:
https://www.exceltrainingvideos.com/add-text-to-displayed-excel-numerical-value/