Sears is adding a new line of John Deere lawn mowers. The cost of each such lawn mower is $$321\mathrm{.}00$ with an operating cost of adding this line is estimated to be $40\%$ of the cost of each unit. If Sears matches the competition's retail price of $$649$ on each lawn mower, what will be the operating profit per unit?Question $2$ Select one:A$.$$$128\mathrm{.}40$B$.$$$61\mathrm{.}40$C$.$$$328$D$.$$$259\mathrm{.}60$E$.$$$199\mathrm{.}60$