Respuesta :
it looks like it sums the tihings alll before it
so in row A, collumn n, so An, it would be SUM(A1:A(n-1))
so
C6 is SUM(C1:C5)
D
so in row A, collumn n, so An, it would be SUM(A1:A(n-1))
so
C6 is SUM(C1:C5)
D