Import Excel to existing Smartsheet & keep existing smartsheet columns

I've been copying/pasting excel data into an existing smartsheet. It's not a lot of rows but I have column formulas in smartsheet that I want to keep. If I import the excel to my existing that has 10 columns but my smartsheet has 15 columns (5 are the formula columns) is there a way to keep these 5 columns while importing the excel? Data Shuttle would only make sense if I was working with a lot of data.

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