It depends if they are copper-nickel (post-1964) or 90% silver quarters (1964 and earlier). If they are copper-nickel, dated 1965 and earlier, they are only worth face, if they are silver, they are worth the silver content.
460.00
It depends if they are silver (pre-1965) or clad (1965 and onwards) if they are clad they are only worth face value, but if they are silver, that is 379.16 troy ounces of quarters, which at 90% silver, gives you 341.244 troy ounces of silver, which at a spot price of $28 gives you $2729.952 in silver content.
$800
$884.00
A modern quarter weighs 5.67 grams. 128 lbs is 58,059.82 grams, so that's about 10240 quarters, or $2560.
50*16*$16.88=$13,504.00
One modern U.S. quarter weighs 5.67 grams. At 80 quarters per pound, 19.4 pounds is 1,552 quarters, which is $388.
Using modern (1965-present) quarters at a weight of 5.67 grams, with 453.59 grams to a pound, that gives 80 quarters per pound. 59 pounds times 80 quarters is 4,720 quarters, divided by four makes $1,180.
1000$
US quarters weigh 5.67 gm which is 0.2 ounces, so 5 ounces would be 25 quarters, or $6.25 Canadian quarters made since 2000 weigh 4.40 gm, so 5 ounces (142 gm) works out to 142/4.4 = 32 quarters (rounded to the nearest whole number). 32 quarters are of course worth $8.
337 pounds of quarters is equal to approximately $6740.