Are you sure that you are using the appropriate RoundingMode? RoundingMode 1 is ROUND_DOWN and RoundingMode 5 is ROUND_HALF_DOWN. Perhaps you are supposed to use ROUND_HALF_EVEN (which is common in some financial scenarios)?
Also, the code would be clearer if you used these enum constants instead of the RoundingMode.valueOf method.
You always run into questions about the exact rounding rules with problems like this.
Like, do we round before or after the subtraction. Also, you might say that as a shortcut, a 1.5% discount is the same as saying that we charge 98.5% of regular price, so we should just be able to multiply the original price by 98.5% and not have to do an extra subtraction. Right?
Suppose the price is 667.00.
Method 1: 667.00 * .015 = 10.005, round up to 10.01. Then 667.00 - 10.01 = 656.99.
Method 2: 667.00 * .015 = 10.005. 667.00 - 10.005 = 656.995. Round up to 657.00. Different answer.
Method 3: 667.00 * .985 = 656.995, round up to 657.00.
Also, Roney mentioned that the table is wrong for 1077.70. It's also wrong for 1280.55.