1 gallon is 231 cubic inches. 1 cubic inch of silver would be about 171.9 grams There's about 31.1 grams in a troy ounce. So each cubic inch is about 5.5 troy ounces of silver. So if the one gallon bucket was poured full of liquid silver, the contents would be about 1270.5oz Multiplied by $30 = $3811.5