Put Value Number after Formula

Hi John thanks but don't work, I need cutoff every friday, I have I field Semana that every week change from 9 to 10 to 11 .......

The Formula works 

let x := (select Documentos where Semana = 9);
sum(x.'Horas Ganadas Plan')

Example for week 9 place 144 is ok but for week 10 sum the 9 and 10 366 and week 9 place 0 

I have 52 weeks field 

But I need the value number for each week from the  sum(x.'Horas Ganadas Plan')

I hope explain good 

Thanks

Hi John where I cutoff date in week 9 I earned some hours in my case 144 hours my next cutoff date 10 I earned 200 hours more in each week earned hours I need to maintein these hours by each week but the Formula sum the week 10 344 and 0 in the week 9.

I cutoff every friday and the Project have 22 week, I need earned hours for each week to create the S Curve.

Ok in that views I earned 144 hours in week 9 in week 10 earned 200 but sum week 9 and 10 

I need sum each week

I have a DataDate that I change every friday for calculate the earned value hours the problem I have is that the when calculate for semana 9 is ok but when calculate for semana 10 sum botón week that I need is sum week by week.

For week 9

 let x := (select Documentos where Semana = 9);
sum(x.'Horas Ganadas Plan')

For week 10

let x := (select Documentos where Semana = 10);
sum(x.'Horas Ganadas Plan')

Some difficult explain in my bad english

If I keep the hours earned for each week I can create the curve  S for the Project 

Complex yes, First I have the week that I need for Project for now I work with 15 weeks

Not working because I change the datadate every week and I have a field week(DataDate) that gives me the week.and the week change every week.

Thanks 

These picture saw DataDate 4 Mar week 9 and Horas Ganadas Plan 144

The second pinture saw DataDate 11 Mar week 10 and Horas Ganadas Plan 200