Microsoft Excel specialist

Easy task for a Microsoft Excel Specialist: I need to export a 200 pages price list from PDF to Excel file keeping the exact same structure ( titles, products, prices, columns and rows...); then apply a formula or function to change prices in two ways: 1st : Change the %(percentage) number in one specific cell to change all prices on same time. (example: if I change the price on this cell +20% or -20% all prices on list will change on same time) 2nd: Change the %(percentage) number in one specific cell by "category" to change all prices on same time on that specific category. (example: if I change the category price on specific cell +20% or -20% all prices only on that specific category will change on same time) *Important things to consider: - The price list have 35 different categories (Posters, Flyers, Business cards, Hang tags etc...) - after job done, please show-me the cells that I should change the percentages. Thank You