VWX Paper Ltd. has a production capacity of 300,000 units per month. Below is the cost data for different activity levels:

Particulars of Costs	100,000 units	200,000 units	300,000 units
Direct Material	₹15,00,000	₹30,00,000	₹45,00,000
Direct Labour	₹12,00,000	₹24,00,000	₹36,00,000
Total Factory Overheads	₹18,00,000	₹36,00,000	₹54,00,000

You are required to calculate:

1. The total cost at an activity level of 250,000 units.
2. The cost per unit at this activity level.
3. The selling price per unit if a profit margin of 25% on cost is desired.
4. The contribution margin per unit if the selling price per unit is ₹60.