Workflow Rule Spreadsheet Setup for Sequential Invoice Approvals

Hello

We’re currently working on configuring the Invoice Approval rules on Workflow Rule Spreadsheet. Our requirement is for invoices to be sent first to the approvers in an Approval Group, and once approved, sent to the Cost Centre Manager as the second approver.
To achieve this, would we need to create two separate blocks—one with Approval Routing set to “Group in Serial” for the Approval Group, and another with Approval Routing set to “Supervisory Hierarchy” for the Cost Centre Manager (as the Start Approver)? After that, would we simply add both blocks to the Simplified Rule Blocks Configuration worksheet?