How to enable upload of csv

I love the plugin, however i want to know how possible this can be.

1. using pricing amount as part of the column so that the values of that column will be added to the total amount of gravity form product field, because i want all the column total to affect or synchronize with the product total.

2. i am seriously thinking if there is a way where by someone can upload a well formatted csv file in the front end of the form and the list field will be automatically updated or filled with the values of that csv including amount and field values and the exact number of rows as it was filed on the csv file.

THIS CAN HELP A LOT ESPECIALLY IF THE USER WANTS TO SUBMIT A LIST WITH OVER 400 ROWS AND IN TWO COLUMNS EACH, FILLING SUCH INFORMATION ONE BY ONE WILL BE A LOT OF WORK.
PLEASE ANYONE WHO CAN SOLVE THIS PROBLEM SHOULD LET ME KNOW EVEN IF IT WILL COST A SMALL FEE