investment? examine the resulting profit margin by examining profit as a percentage of sales. are $135,000$ and office overheads are $110,000$ :

$\backslash$table$[[$Production Costs,Volume X$,20$ Units,Volume Y$,25$ units$],[$VARIABLE COSTS:,nnnn$,$nnnn$],[$Direct materials $(600$ ea$),,$nnnn$],[$Direct labour $(500$ ea$),$nnnn$,$nnnn$],[$Maintenance $(140$ es$),$nnnn$,$nnnn$],[$Machinery $(160$ ea$),$nnnn$,n$