The total manufacturing costs for Job No. 176 is $3000,000.
The cost that are associated with the process of manufacturing a product refers to the manufacturing cost. It includes the cost of all resources that are used in the production process. There are three categories under which this manufacturing cost gets divided. It includes, direct material cost., direct cost and  manufacturing overhead cost.
In the example given:
Direct material cost = $100,000
Manufacturing overhead = $120,000
It has been stated that the 1505 of direct labor cost is applied to the overhead.
Thus; 120,000\150% = 80,000
Manufacturing cost = Manufacturing overhead + Direct Labor cost + Direct material cost
= 120,000 + 80,000 + $100,000=
= Â $3000,000.