From the global toolbar, click 
> Seasonal Plans.
Click the name of a Seasonal Plan to open the powerview page.
From the page toolbar, click Categories > Plan
Objectives to open the PowerView page.
Expand the Marketing Name to the lowest Forecast Level. For details,
see Working with Seasonal Workbench.
Click Edit All to Edit the all values.
Edit the values for Forecasted Quantity, Retail Price, and Wholesale
Price. Click Save to save these values.
To mass update the columns Forecasted Quantity, Retail Price and Wholesale
Price, select the column to be edited from the Mass Update drop down
list. Enter the value for the selected column. Click Apply
to Selected to apply the value to the selected row. Click
Apply to All to apply the value to all the rows.
Click Save to save the changes.
Click View All to view the changes. The values
for Forecasted Quantity, Actual Revenue are rolled up for each product
type.