Hello! Here are the improvements brought by this update.
Mass
update of item unit costs
It was
already possible for manufactured items to update the unit cost after changing
the production recipe. For more efficiency, you can now perform this action on
multiple items at once. Learn how
here. 
Adding markups to sales order line items
To allow for more flexibility when quoting, a markup can be added to the sales price of items in a sales order. To learn more, click here.
Landed costs
distribution on purchase orders
Cost
distribution for landed cost can now be added directly to purchase orders,
thanks to the new feature: Distribute costs. Find out how
to do it here.
Include
customer notes in Zoho Books invoices
Display
management of files in cards in the Projects section
For
many, the cards Files section took up too much space on the screen. Good news:
we've added a button to let you hide it! Find it at the top of a card page in
the Project section.