A company is using a Kanban system with $3$ containers, each holding $40$ parts, between a downstream $($using$)$ and an upstream $($producing$)$ work center. The using work center can handle $270$ jobs per day. The average elapsed time for the entire cycle is currently $0\mathrm{.}25$ days. The company is concerned about the safety factor for the operation. Which of the following is the safety factor $(\backslash$alpha $)$ of the current operation?

a$.86$ percent

b$.78$ percent

c$.44$ percent

d$.6$ percent