$1,139.00 / 1.0765 = $1058.06

$1058.06 * (.25 + .124 + .029) = $1058.06 * .403 = $426.40

(.25 + .153) / 1.0765 = .37436...

(.396 + .153 + .009) / 1.0765 = .51834...