Assuming it is calculating interest daily but does not COMPOUND interest daily. The solution for this problem is:
$1300.00 x 2.65% / 365 days x 10 days = $.94
$1800.00 x 2.65% / 365 days x 10 days = $1.30
$2800.00 x 2.65% / 365 days x 10 days = $2.03
The answer is: $4.27 = .94 + 1.30 + 2.03