Concept:Manufacturing profit is the excess of total sales revenue over the total production cost.Explanation:First, calculate total sales revenue.Selling price per unit is ₦120 and production volume is 4000 units.Total sales revenue =4000×120=₦480,000.Then subtract total production cost from total sales revenue.Manufacturing profit =₦480,000−₦360,000=₦120,000.The factory overhead cost of ₦56,000 is already part of production cost, so it is not subtracted again.Answer:Total manufacturing profit is ₦120,000.Correct option: B. ₦120,000.