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Help on weighted GPA

I have tried to figure out how but still doesn't come out correct. image How do you calulate the weighted grade point average on a set. I need to do it on the Walker 33-47 set. with the bonus points every time I do it it doesn't come out right image
Thanks in advance
Mike
Building 33-47 Mint Sets always looking for MS67s PM with any coins you might have for sale.

Mike
idocoins

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    I would think multiply each coins grade by it's weight . Add them and any bonus' togather . Divide by the total # of weights.

    EDIT TO ADD:

    The above gives you the set rating. You want to multiply the coins grade by the weight for that coin and divide by
    just the total weights of the coins you have .
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    saintgurusaintguru Posts: 7,724 ✭✭✭
    They have formulated spreadsheets that they use. I don't think it's an easy one.....
    image
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