A company is using a Kanban system with $3$ containers, each holding $20$ parts, between a downstream $($using$)$ and an upstream $($producing$)$ work center. The using work center can handle $130$ jobs per day. The average elapsed time for the entire cycle is currently $0\mathrm{.}30$ days. The company is concerned about the safety factor for the operation. Which of the following is the safety factor $($$)$ of the current operation?

a$.85$ percent

b$.54$ percent

c$.35$ percent