On the Top Left of the Summary Page is a Visualization that Shows the Current (Previous Toggle) of Spending based on the Status of Cards Approvals. Unallocated Spend identifies AWS Account's that have yet to be mapped and have spending.
Month to Date is the Total Spending of the Users Financial Scope within that Month. This includes the spending that has been Approved and has Other Statuses. The Approved Spend is all Approved Spending. Open Spend is Spending that has yet to be Approved.