Today, a SFr future contract has the settlement price of $1.72/SFrat CME. The initial and maintenance margin are 150,000 USD and 100,000 USD of the contract value of 1,000,000 SFr in that order. The next five days' settlement prices are $1.85, $1.90, $1.70, $1.65 and $1.55.

1. In case of long position, what will the result in the balance of margin account after five days will be?
2. How much you have to pay more into margin account to maintain the long futures contract.