This sock cannot exceed 54 g total of the Charlevoix yarn.

Prob the best way to go about this is:

34g white (from ball 1 of 2 white balls)

13g grey (from ball 1 of 2 grey balls) PLUS 6-7 g of grey from ball 2. This means you CANNOT do the heel in grey. Instead, do the whole sock below the cuff in white, till you get to the heel (and then do a small amount of the toe in grey). OK - well that didn’t work because I completely forgot as I was knitting. So perhaps the next version of this sock I make (more white than grey) will have to follow this rule.