Strama, Incorporated, manufactures and sells two products: Product A$6$ and Product $15.$ The company has an act based costing system with the following activity cost pools, activity measures, and expected activity.

$\backslash$table$[[$Activity Cost Pools,$\backslash$table$[[$Activity$],[$Measures$]],\backslash$table$[[$Estimated$],[$Overhead$],[$cost$]],$Expected Activity$],[$Product A$6,$Product $15,$Tota:$],[\backslash$table$[[$Labor$-$related$],[$Production orders$],[$Order size$]],$DLHS$,$$ $183,138,7,400,2,000,9,400],[$orders$,4,624,500,700,1,209],[$MHs$,175,147,4,800,4,900,9,700],[,,$$ $398,909,,,]]$

The activity rate for the Order Size activity cost pool under activity$-$based costing is closest to: