the answer to both your questions is yes
discounts can be applied with either conditions you mentioned and quite easily
yes, a link to a pdf file can be coded into the product description, or through a tabbed page dedicated to that subject
the answer to both your questions is yes
discounts can be applied with either conditions you mentioned and quite easily
yes, a link to a pdf file can be coded into the product description, or through a tabbed page dedicated to that subject