If average fixed cost is `Rs 40` and average variable cost is `Rs. 80` for an output level is `10`, then the total cost is

Calculate average variable cost at each level of output :

The average fixed cost at 4 units of output is ₹ 20 . Average variable cost at 5 units of output is ₹ 40 . Average cost of producing 5 units is : (Choose the correct alternative)