Last year, to produce 267 units of our signature product, we required 76 hours of labor, 366 dollars worth of overhead, and 60 units of material. During that time period, labor cost 39 per hour and material cost 28 per unit, and a unit of output was worth 521. If this year everything stays the same except a 10 decline in the value of a unit of output, what will be our multifactorial productivity?