TreeTop Ltd

TreeTop Ltd. currently sells $189,000 of trees, $286,400 of evergreen shrubbery, and $62,800 of flowers. It is considering adding flowering shrubs to their product line. Given this change only, sales are estimated at $168,000 for trees, $239,700 for evergreen shrubbery, $59,900 for flowers, and $136,800 for the flowering shrubs. What is the amount of the erosion?

A) $66,200
B) $68,900
C) $70,600
D) $73,300
E) $136,800