RE: TONNAGE FOR EVG...
<<<It takes 28 gpt to make 1 ounce of gold.>>>
You're thinking in terms of avoirdupois ounces which have 28.35 grams per ounce.
Gold, however, is measured in troy ounces.
One troy ounce is exactly 31.1034768 grams which obviously will change the final number to some extent.