T(x) = 0.18x {0 ≤ x ≤ 237100}
T(x) = 42678 + 0.26(x - 237100) {237100 < x ≤ 370500}
T(x) = 77362 + 0.31(x - 370500) {370500 < x ≤ 512800}
T(x) = 121475 + 0.36(x - 512800) {512800 < x ≤ 673000}
T(x) = 179147 + 0.39(x - 673000) {673000 < x ≤ 857900}
T(x) = 251258 + 0.41(x - 857900) {857900 < x ≤ 1817000}
T(x) = 644489 + 0.45(x - 1817000) {x > 1817000}
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