Auto Parts Ltd. has the following cost data for its two product lines, Engine Parts and Body Parts:

Particulars	Engine Parts (₹)	Body Parts (₹)
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	60,000	80,000

Requirements:

1. Calculate the total cost for each product line.
2. Determine the cost per unit if the production volumes are 9,000 units for Engine Parts and 11,000 units for Body Parts.
3. Compute the selling price per unit if the desired profit margin is 20% on cost.
4. Analyze the effect on total cost if direct material costs increase by 12%.