what are the best practices for leveraging multi period accounting(MPA) in payables

Summary:

We are planning to leverage MPA in Fusion payables. So we would like to know what are the best practices followed for MPA in fusion payables.

Content (please ensure you mask any confidential information):

1.How invoice processor would know which invoice is eligible for MPA So that MPA fields(start date,end date and MPA accrual account) will be entered on the invoice lines.?

2)Also Can we amortize expenses unevenly?

For example-if we need to amortize expense of 1000USD across 4 months starting from Jan-Apr.

Jan-100 USD

Feb-250

Mar-350

APR-300
is it possible to achieve this?

Version (include the version you are using, if applicable):