First we can add a row helper indicating columns we wanted to sum.
E.g.,
[TABLE="width: 896"]
<colgroup><col width="64" style="width: 48pt;"><col width="64" span="13" style="width: 48pt;"></colgroup><tbody>[TR]
[TD="width: 64"]Columns[/TD]
[TD="class: xl65, width: 64"]F[/TD]
[TD="class: xl65, width: 64"]G[/TD]
[TD="class: xl65, width: 64"]H[/TD]
[TD="class: xl65, width: 64"]I[/TD]
[TD="class: xl65, width: 64"]J[/TD]
[TD="class: xl65, width: 64"]K[/TD]
[TD="class: xl65, width: 64"]L[/TD]
[TD="class: xl65, width: 64"]M[/TD]
[TD="class: xl65, width: 64"]N[/TD]
[TD="class: xl65, width: 64"]O[/TD]
[TD="class: xl65, width: 64"]P[/TD]
[TD="class: xl65, width: 64"]Q[/TD]
[TD="class: xl65, width: 64"]R[/TD]
[/TR]
[TR]
[TD][/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[TD="class: xl66"] [/TD]
[TD="class: xl66"]1[/TD]
[/TR]
[TR]
[TD][/TD]
[TD="class: xl67, align: right"]0.780824[/TD]
[TD="class: xl67, align: right"]-0.09437[/TD]
[TD="class: xl67, align: right"]0.904573[/TD]
[TD="class: xl67, align: right"]0.554762[/TD]
[TD="class: xl67, align: right"]-0.09173[/TD]
[TD="class: xl67, align: right"]-0.14365[/TD]
[TD="class: xl67, align: right"]0.186682[/TD]
[TD="class: xl67, align: right"]0.505822[/TD]
[TD="class: xl67, align: right"]0.120212[/TD]
[TD="class: xl67, align: right"]0.327678[/TD]
[TD="class: xl67, align: right"]0.544227[/TD]
[TD="class: xl67, align: right"]0.526816[/TD]
[TD="class: xl67, align: right"]0.851565[/TD]
[/TR]
</tbody>[/TABLE]
From there, we can use SUMIFS function
=SUMIFS($F$11:$R$11,$F$11:$R$11,">"&0,$F$10:$R$10,1)