margin and mark up

Registered Posts: 734
if I have to work out sales with 40% mark up for part a and a 40% margin for part b. how are these different and worked out? The example I looked at wasn't very good

• Registered Posts: 373
Mark up is the percentage that you increase the cost price by, so if you purchased an item for £100 the markup would be £40 as this is 40% of £100. Total selling price would be £140.

If you were to apply a margin of 40% to the £100 item, £100 would represent 60% of the total cost (100 - 40) so, £100/60 x 100 would give you the selling price of £166.67 with £66.67 being the margin.
• Registered Posts: 218 ? ? ?
See the attached document

• Banned User Posts: 93 ? ? ?
Gross Profit Margin = --Gross Profit---x 100

Sales

Gross Profit Mark up = --Gross Profit---x 100

Cost of Sales

NET Sales - Cost of Sales = Gross Profit

Cost of Sales = Opening Stock + NET Purchases - Closing Stock

Use these formulae and you'll have no problems. If your algebra was good at GCSE level then you should be able to rearrange these formulae to find whatever is missing. This method works for me.