Answer:
material loading charge = Â 25%
so correct option is B) 25%
Explanation:
given data
Labor profit margin = Â $10
Materials profit margin = Â 20%
Total labor charges = Â $260
Cost of materials used = Â $100
Total hourly cost  = $22.50
to find out
material loading charge
solution
we know that Cost of materials and Materials profit margin
so material cost will be here
material cost  = Cost of materials used - Materials profit margin
material cost  = $100 - 20% × $100
material cost  = $100 - $20 = $80
so
material loading charge will be
material loading charge = [tex]\frac{20}{80}[/tex] × 100
material loading charge = Â 25%
so correct option is B) 25%