1 Your rent and your date
2 What else is due on day one (optional)
Landlords usually want the part-month rent plus these up front. Leave any blank if it doesn't apply.
3 The breakdown
Day-one cheque
Two things that quietly change the number
Which method does your lease use?
The breakdown highlights one. Pick the method your lease names, or leave it on the exact-days one, the method most guides call the fairest.
General information, not legal advice. Your lease and local law decide which method applies.