The function RoundTo is a bit counter-intuitive because everybody calling RoundTo(x, 2) thinks that it rounds x to 2 decimal places. No, it rounds to multiples of 10 to the power of the second argument. In other words: 10^2 is 100, and thus RoundTo(x, 2) rounds to full hundreds, e.g. RoundTo(871.6666, 2) becomes 900, but RoundTo(8.71666, 2) becomes 0 because it is less than 100.

In order to round to two decimal places you round to multiples of 0.01 = 10^-2. therefore, you must call RoundTo(x, -2).