You Have Been Asked by Your Employer to Gather Data

You have been asked by your employer to gather data about the costs of producing a continuous-curl potato chip. Your company has the opportunity to buy the rights to a patented machine,but your boss wants to know how much the raw materials (potato,salt,oil,),warehousing,maintenance (blades,motors),and processing will cost.
-List at least six formal sources you would trust to generate the required data.
-Now explain how you could gather the same information in Patatinia,a country where a)you are not allowed Internet access,b)you may not go to a library,c)the periodicals and books available have biased perspectives that you feel are untrustworthy,and d)the supply of potatoes is seasonal. (Assume you have nobody at home who could send you the information.) In other words,in Patatinia you will have to rely on informal sources.