A product has the following costs.
$
Direct materials 15
Direct labour 9
Variable overheads 16
Fixed overheads are $9,000 per month. Budgeted sales per month are 450 units to allow the product to break even.
Fill in the blank in the sentence below.
The mark-up which needs to be added to marginal cost to allow the product to break even at the budgeted units is _______ %.