Working out a formula from a set of data
I would like to know what sort of formula my competitiors (if any) are using to price up their products. Some data I have gathered is below.
my cost ex VAT Competitors Retail price
What I would like to know is how do I workout the formula that best suits the relationship between cost of product and final retail price.
Or could someone tell me what maths subject this comes under so I can do some reading up and learn myself.
Any help would be greatyly appreciated and a big help.