A thin piece of metal foil is 1.389 ft. long and 5.05 inches wide. The density of the metal is 8.785 g/cm3 and the specific heat of the metal is 0.425 J / g oC. If the metal foil absorbs 864.7 J of heat as its temperature changes from 21.32 oC to 34.80 oC, calculate the thickness of the metal foil in mm.