Two subassemblies, A and B$,$ are processed separately, each requiring two finishing operations. A is routed through operations $1$ and $2,$ and B is routed through operations $3$ and $4.$ The two subassemblies are then joined in an assembly operation $($operation $5).$ The five operations have the following fraction defect rates: q$1=0\mathrm{.}03,$ q$2=0\mathrm{.}08,$ q$3=0\mathrm{.}05,$ q$4=0\mathrm{.}09,$ q$5=0\mathrm{.}01.$ If the desired final quantity of completed assemblies is $10,000$ units, how many starting units of A and B will be required? There is no inspection or separation of defective units until after the final operation, so defective units and good units are processed together through all processing and assembly steps