WEEK 4 practice assignment

[Hritik]

Raghav sells 2000 packets of bread for Rs. 20000 each day, and makes a profit of Rs. 4,000 per day. He finds that if the cost price increases by
Rs. x per packet, he can increase the selling price by Rs. 2x per packet. However, when this price increase happens, he loses 200x of his customers.
   Choose the correct options.

 For the maximum profit per day, cost price is Rs. 12 per packet

 For the maximum profit per day, cost price is Rs. 4 per packet.

 For the maximum profit per day, the sale price increases by Rs. 4 per packet

 For the maximum profit per day, Raghav will lose 400 customers

 The maximum difference in profit per day could be Rs. 3200

 The maximum difference in profit per day could be Rs. 7200

crap! I ain't knowing how to start! can anyone please  help?