Without units for the 11.4261 I'm going to have to guess what they are (assuming they are some kind of currency - I've got no idea (nor do I want to know) how much 11.4261 kg of cocaine costs).
To the nearest cent:
£11.4261 → $18.38 (at the exchange rate as of 08:06 GMT, 15/11/13).
11.4261¢ → 11¢
$11.4261 → $11.43
1.239 rounded to the nearest cent is 1 cent.
298.987 cents, rounded to the nearest cent is 299.298.987 cents, rounded to the nearest cent is 299.298.987 cents, rounded to the nearest cent is 299.298.987 cents, rounded to the nearest cent is 299.
2.49 is already rounded to the nearest cent.
2.66 is rounded to the nearest cent.
.0306 rounded to the nearest cent is .03.
7.69647696 rounded to the nearest cent is 7.70
46.0052 rounded to the nearest cent is 46.01
76.23 rounded to the nearest cent is 76.23
132.1353 rounded to the nearest cent is 132.14
$2,380.679 rounded to the nearest cent is $2,380.68.
4.85 is already rounded to the nearest cent.
$0.1625 rounded to the nearest cent is $0.16.