If your wash sale losses in total are $7,375, which are not allowed if you still hold all the stocks included for wash sale as of December 31, 2020, then your gain is correct.
-3,250 overall loss including wash sale unallowed losses
7,375 adjusted for the overall wash sale unallowed losses
4,125 equals the total required reportable gain
This is the correct result based on your numbers and assuming you still hold all the stocks involved in wash sale rules. This is the part you must review to see if you do actually hold all the stocks that fell into the wash sale rules at purchase.
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