Importing Contacts, Products and a mapping between them

Importing Contacts, Products and a mapping between them

Suppose I have an excel file with the following fields:

Name            Email            Product            Quantity
John              ...                 Radio               1
Marc             ...                  Radio               2
Tessa            ...                  TV                   1
Jessica          ...                  Radio              1
Eddy              ...                 Clock               2
Carl               ...                  Radio               1
Carl               ...                  TV                   1

I would like to import this excel file into Zoho CRM (probably I need several steps). After the importing process, I would like to have 6 contactpersons and 3 products and a mapping between the contactpersons and products.

1) What would be the right process to follow?
2) Is there any logical place to store the information about the quantity of products bought per contactperson?
3) Is it possible that one contactperson has more than one record in the excel representing multiple products?

Any help would be highly appreciated...    Thank you in advance!