Contract	3
Each Contract Size	200-ton corn
Initial Margin	$7000/Contract
Maintenance Margin	65%

Day	Trade Price	Settlement Price
1	$1,853
2		$1,860
3		$1,845
4		$1,832
5		$1,843
6		$1,855
7		$1,875
8		$1,788
9		$1,802
10		$1,849
11		$1,865
12		$1,887
13		$1,898
14		$1,923
15		$1,911
16		$1,893
17		$1,849
18		$1,832
19		$1,823
20		$1,811
21	$1,778

From the above information calculate daily gain, cumulative gain, margin account balance and margin call (if any) on daily basis.