About 7 pounds but its better value to get 1200
The smallest you can buy is 600 MSP.
3600 Microsoft points cost £31.87
1600 Microsoft points.
1200 microsoft points
800 microsoft points = $10 USD
1200 Microsoft Points
The cost for 80 Microsoft points for Cars 2 on Xbox 360 is approximately $1.00. As of 2013, the cost for 1600 points is $19.99. Microsoft points can be purchased online or in retail stores.
It costs 240 Microsoft Points, but the cost can be different depending on the region you live in. It cost me 240 Microsoft Points because I live in New York.
1200 Microsoft points (£10.20)
$19.99
£51.00
800 Microsoft points
around $19.99