Eight short tasks that mix everything from this unit, on new numbers and new companies. No steps: read the sheet, decide what the row needs, and write one formula you can fill across.
As you go, ask the modeler's questions. Is this an input or a calculation? Should the reference move when I fill, or stay locked? Which way does the cash go? Can the bottom of this ratio be zero? Would the check catch a mistake in every year, or only one?
Every answer is re-checked on hidden data, so a typed number or a hard-coded rate won't pass.