Sorry ... mistake. Just deleted it. Should be like ...
Like a product costing $0.99 - $2.00 I may charge $5 (approx $5 or less markup)
and a product costing $2.00 - $5.00 I may charge $9.50 (approx $4.50 or more markup)
and a product costing $5.00 - $10.00 I may charge $14 (approx $4.00 or more markup)
and so on ... decreasing a little each time as the product gets more expensive.
But those are just an example of the system. Not my actual figures.
There's also other threads about this ... somewhere.