ok so you have a gold bar in a panel and if we know the weight of a gold bar is
1 troy ounce of gold = 31.1034768 grams = 1.09714 ounces

1 tael of gold = 50 grams = 1.76369 ounces

1 tola of gold = 10 grams = 0.352739 ounces

but i am still perplexed...hmmmm keep thinking