What is the LineAmount attribute in BPM for PO

In the BPM for PO under the task "ReqApproval" - I see that line price and line amount attributes as below.

ReqLineDimension.price
ReqLineDimension.amount

Similarly, i would like to know the matching attributes for Requisition Price and Amount fields in the PO under the task "DocumentApproval". I understand for the price we can use this attribute below.

PurchasingDocumentLine.unitPrice

But could you please confirm if the below is the right attribute to match for Requisition amount.

PurchasingDocumentLine.lineAgreementAmount