VBA- deleting rows which contain cells that meet criteria, but skip alpha rows

I'm trying to accomplish deleting rows given the simple formula below in my code. However I have alphabetic characters separating sections, thus the macro stops when it reaches a non-numeric value row.
Unfortunately I could not find anywhere online a 'skip' function of somekind that I can say to skip all rows that have letters in them and continue the code to the next i.
Any help would be greatly appreciated.

Here is what I have so far:

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Thanks