Versions of s. 52(3)(c)

the costs, charges and expenses incurred by the producer in respect of engineering, development work, art work, design work, plans or sketches undertaken in Canada that were supplied, directly or indirectly, by the purchaser of the goods being appraised for use in connection with the production and sale for export of those goods, apportioned to the goods being appraised as referred to in subparagraph 48(5)(a)(iii).