Total cost (Tc) = N75.00Price (P) = N7.00Output (Q) = N25 unitsProfit = ?To derive the profit of the firm, the total revenue must be expressed. It can be expressed asTotal revenue (TR) = Price (P) × Quantity (q)Therefore, TR = P × Q= 7 × 25 unitsTr = N175Therefore, Profit = TR – TC= N175 – N75Profit = N100