Enhanced Xbox Version 1 Submarine = 1,500,000 = 3.00 SAR 2 Submarines = 3,000,000 = 6.00 SAR 3 Submarines = 4,500,000 = 9.00 SAR 4 Submarines = 6,000,000 = 12.00 SAR 5 Submarines = 7,500,000 = 15.00 SAR 6 Submarines = 9,000,000 = 18.00 SAR 7 Submarines = 10,500,000 = 21.00 SAR