How to make a link between an excel file and AppInventor

If you want to do it entirely in blocks,
you can create a collection of value procedures, one per Excel cell,
each named after the cell (i.e. O23) containing that particular formula.
In the procedure definition, duplicate the calculation from that Excel cell,
using value procedure calls for the cell references.

This will be tedious and dumb, but can be split up among a team
and can be combined via AI2's Download as Block Image option,
one image per function, and the Block Editor's secret
Drag and Drop feature.

By the Way, double check the AI2 docs for its trig functions.
Are they in degrees, or in radians?