Your decimal places are off.
3) 66 + 863.1 + 167 - 122.4 = 973.7
4) 973.7 * .5 = 486.85
5) 973.7 + 486.9 = 1460.6
1460.6 * .1 = 146
1460.6 + 146 = 1606.6
3) 66 + 863.1 + 167 - 122.4 = 973.7
4) 973.7 * .5 = 486.85
5) 973.7 + 486.9 = 1460.6
1460.6 * .1 = 146
1460.6 + 146 = 1606.6

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