Summarized column using crosstab in crystal report xi

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CrystalReports

Is there anyone who can help me about my issue in crosstab? I need to get the sum of the column Total hours

This is what i need.
Ref No | Order No | Total Hours| January | Total
RF-0121-00 | 5350-1403-001 | 63 | 56 | 119
RF-0121-01 | 5350-1403-002 | 100 | 232 | 332
Total 163 288 451

*the column month is the project total

This is the result i get
Ref No | Order No | Total Hours| January
RF-0121-00 | 5350-1403-001 | 63 | 56 63
RF-0121-01 | 5350-1403-002 | 100 | 232 100
Total 288

in crosstab expert i have:

in columns
>tblHours.Month

in rows
>tblHours.Ref_No
>tblHours.Order_No
>tblHours.Total_Hours

in summarized fields
>tblHours.Project_Total
>tblHours.Total_Hours



Thank you