-10% 9192.0, 2000, tax: -800.0
+10% 9192.0, 2711.2, tax: 71.12
-10% 8535.92, 2711.2, tax: -648.08
+10% 8535.92, 3285.672, tax: 57.4472
-10% 8002.8952, 3285.672, tax: -525.0248
+10% 8002.8952, 3749.39432, tax: 46.372232
------------------------------------------------
total...