Chapter $1,$ Question $2$

$\backslash$table$[[$Week$,$Revenue,Expense,Profit $/$ Loss$],[1,$$$935\mathrm{.}50,$$$771\mathrm{.}80,],[2,1,177\mathrm{.}60,571\mathrm{.}46,],[3,1,461\mathrm{.}80,933\mathrm{.}33,],[4,1,545\mathrm{.}11,1,510\mathrm{.}20,],[8,,,]]$

Given her sales for the month, tell her how much her ideal expense should have been to realize her desired profit of $$1,400.$

Answer: