Clever Clothing Ltd. provides the following cost details for its two clothing lines, Casual and Formal:

Particulars	Casual (₹)	Formal (₹)
Direct Material	1,20,000	1,50,000
Direct Labour	1,40,000	1,70,000
Factory Overheads	1,60,000	2,00,000
Selling and Distribution	70,000	80,000

Requirements:

1. Calculate the total cost for each clothing line.
2. Determine the cost per unit if the production quantities are 8,000 units for Casual and 10,000 units for Formal.
3. Calculate the selling price per unit for both lines if the desired profit margin is 20% on cost.
4. Evaluate the new total cost if factory overheads increase by 15%.