Document Totals 
The Document Totals tab is available on purchase orders and contracts. It gives you an overview of the total value of all items in your procurement document. It comprises:
Total value of all line items within the procurement document, detailed as follows:
Net value (excluding tax)
Tax value
If several tax types apply, the amounts are also displayed per tax code.
Gross value (including tax)
Total of minimum values that you have specified in contracts or mixed-use purchase orders.
To calculate the minimum values of mixed-use purchase orders, the system totals the following values:
Value of all line items that are definitely ordered
Minimum value of all order-type line items
Note that the values of inactive options are not included in the total values.
Prerequisites
In SAP SRM, you have activated the following business functions:
SAP SRM Procurement for Public Sector Basis (/SAPPSSRM/SRM_CROSS_INDUSTRIES)
SAP SRM Procurement for Public Sector Functions (/SAPPSSRM/SRM_PPS)
You have performed the Customizing activities in SAP SRM that are listed and documented in SAP Solution Manager under 
SAP SRM 
Configuration SAP SRM <number of current release>, PPS
Document Totals 
.
Example
The SAP SRM system calculates the minimum values on the Document Totals tab of a mixed-use purchase order as described below. Note that for this example the tax value is not relevant.
You have created a purchase order with the following line items:
Item No. |
Type of Line Item |
Tax Value |
Total Value (Gross and Net) |
Minimum Value |
|---|---|---|---|---|
1 |
Standard |
n/a |
USD 100 |
n/a |
2 |
Optional with option status inactive |
n/a |
USD 200 |
n/a |
3 |
Order type Indefinite Delivery Definite Quantity |
n/a |
USD 500 |
USD 360 |
On the Document Totals tab, the minimum values (gross and net) of this purchase order are calculated as the total values of all line items that are definitely ordered:
USD 100 (total value of the standard line item 1)
+ USD 360 (minimum value of the order-type line item 2)
= USD 460.