Someone at the Home Depot tells you that a 2 bolt is 6.75 times as heavy as a washer. What would be the mass of a box of such bolts

Equation 1

weight of 2 bolt = 6.75 weight of washer

Equation 2

mass = W/g

Where

g = 9.8m/s^2

mass of box of 2 bolt = weight of 2 bolt x 2 bolt pcs/box/9.8 m/s^2

mass of box of 2 bolt = 6.75 weightwasher x 2 bolt pcs/box

if there are 144 pcs of bolts/box

mass of box of 2 bolt = 6.75 weight of washer x 144/9.8m/s^2

mass of box of 2 bolt = 972 weight of washer / 9.8m/s^2

=99.18 weight of washer s^2/m