Company A has break$-$even sales of $90,000$ units and budgeted sales of $99,000$ units. What is the margin of safety as expressed as a percentage?

Seleccione una:

a$.9\mathrm{.}00\%$

b$.9\mathrm{.}09\%$

c$.10\mathrm{.}0\%$

d$.$ None of these answers is correct.