A construction worker wants to make a walkway out of concrete pads. Each pad will be 3 ft × 3 ft × 4 in. The walkway is to be 36 feet long and 3 feet wide. If concrete costs $125 per yd3, how much will the concrete for the walkway cost (plus 13% HST)? The construction worker has been told only whole cubic yards of concrete can be purchased, part yd3 cannot be purchased.​