JKM Food Products Ltd. has a maximum production capacity of 300,000 units per month. Below is the cost data for different activity levels:

Particulars of Costs	150,000 units	200,000 units	250,000 units
Direct Material	₹30,00,000	₹40,00,000	₹50,00,000
Direct Labour	₹25,00,000	₹33,00,000	₹41,00,000
Total Factory Overheads	₹15,00,000	₹20,00,000	₹25,00,000

You are required to calculate:

1. The total cost at an activity level of 225,000 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 variable cost per unit if the fixed overheads are ₹10,00,000 per month.