For the homework, you need to read Fonderia di Torino case, take the base-case spreadsheet provided on the web-site, and adapt it.
In other words, calculate NPVs for the following scenarios:
1) Economy expands (the firm works 3 shifts per day) and economy contracts (1 shift per day)
2) (a) the firm cannot lay off any employees, and (b) the firm cannot lay off, but can re-assign employees into lower-paying jobs
3) inflation increases to 3% (from 0%)