NPV

Hie sir .
On question 122 BPP kit
They say

Cash flows
T0 investment 100 000
T1-5 Net cash inflow 40 000

What is the adjusted payback period for this project.

Here

Their cashflows
Are written as
Time 0 40 000
Time 1 40 000
Time 2 40 000
Time 3 40 000

They have separated the 40 000 for each individual year I thought its a net cash flow it will be 40 000 for the whole 3 years

However on question 123
They have the following cash flows
T0 outflow 110 000
T1-4 inflow 40 000

Here they are using an aggregate
….

My question is why the other question they used individual amount each year and the other they used aggregate