Your labor cost $\%$ is $25\%.$ What does this mean?

a$.$ For every $$1\mathrm{.}00$ in total expenses, you have $$25$ in labor cost.

b$.$ It costs $$25$ on average to pay each employee for $1$ hour.

c$.25\%$ of your sales went towards labor expense.

d$.$ You used up $25\%$ of your labor this period.