Model this in a spreadsheet

Help me model this: {{question}}

What I know:
{{inputs}}

Lay it out as a sheet: an inputs block, a calculation block, and the output. Give
the formula for each calculated cell. Keep every assumption in the inputs block so
it can be changed in one place.

Then name the input the answer is most sensitive to, and the range over which the
conclusion flips.

What to fill in

{{question}}

What you're modelling — e.g. when Pro revenue covers the server bill

{{inputs}}

What you know — e.g. current MRR, growth rate, hosting cost