Answer:
Markup percentage on cost of goods sold = ( Sales - Cost of goods sold ) / Sales
Markup percentage on cost of goods sold = (( 540,000 - 324,000 ) / 540,000 ) x 100
Markup percentage on cost of goods sold = ( 216,000 / 540,000 ) x 100
Markup percentage on cost of goods sold = 0.40 x 100
Markup percentage on cost of goods sold = 40%
Total Cost = $324,000 + $126,000 = $450,000
Markup percentage on total cost = (( Sales - total cost ) / Sales ) x 100
Markup percentage on total cost = (( 540,000 - 450,000 ) / 540,000 ) x 100
Markup percentage on total cost = ( 90,000 / 540,000 ) x 100
Markup percentage on total cost = 0.1667 x 100
Markup percentage on total cost = 16.67%%
Gross Margin Percentage = ( Gross profit / Sales ) x 100
Gross Margin Percentage = ( 216,000 / 540,000 ) x 100
Gross Margin Percentage = 0.4 x 100
Gross Margin Percentage = 40%