It is determined that four kanbans are needed in a workstation. The workstation uses $200$ units of part per hour and a kanban will take an average of $60$ minutes to complete a cycle. Assume each standard container holds $60$ units, what safety factor is considered?

Multiple Choice

$0\mathrm{.}15$

$0\mathrm{.}3$

$0\mathrm{.}2$

$0\mathrm{.}25$

$0\mathrm{.}1$