How can I handle a large amount of user inputs on a web application?

I'm creating a web app that requires the user to input about 720 different values (in the form of a 12 x 60 table).

For example:

Note: Each row of the table pertains to a specific item (e.g. the amount of "A" over 60 minutes).

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I've considered the use of a graph for each row. Meaning the user will have an interactive graph that they could drag to represent the proper change in "A" at each time step, but again, this is just as tedious, it just might look better.

Or possibly the use of functions where f(x) represents the behaviour of A, but this may be difficult for the user to understand and harder yet for them to come up with the proper function (if one even exists).

So my question is:

What would be the best way to handle such a situation that makes it the least tedious for the user?