To determine the cost of production of a single unit of Hofburg's product, we just have to multiply the number of pounds to the cost per pound and the number of hour to the cost per hour.
That is,
total cost = ($2/lb)(2 lb) + ($7/h)(1.5 h) + ($8/h)(1.5 h)
total cost = $54
Thus, the cost of the production is $54/unit.