Do you know wheter Quantity passed from Contract line to Event with item based contract or not?

Summary:

Do you know wheter Quantity passed from Contract line to Event with item based contract or not?

When I tried varify about item based contract, I entered 10 in Quantity field in Contract line but it is displayed 1 in Quantity field in Event.

I thought it is initial value.

Contract Line Quantity 10

Event Quantity 1

But I found the following page, it looks we can Quantity passed from Contract line to Event.

The following sentence is transfered about the yellow in highlight.

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Project Billing

Item Billing for Item Contract Details

Bills the customer for an item and retrieves the item, quantity, unit, unit price and amount information for the invoice. The Billing Specialist can retrieve the items and quantities for a billing event and generate an invoice for the event. The item, unit, and item unit price are retrieved from the contract detail associated with the billing event. Prior to this release, the Billing Specialist could only bill for the amount as an item, and quantity details were not captured in the billing event.