Multiedit rows (cells)

Multiedit rows (cells)

Hi. I have spreadsheet (form) with square of landplot. I want to autofill another columns in this table with "size" of land plot. (if square < 1000 sq.m then size = S; if square > 5000 sq.m. then size = XL... etc). Is it possible?

 i wrote field action for report:

if (input.Square  <  700)
{
    input.Size = "XS";
}
else if ((input.Square  >=  700)  &&  (input.Square  <  900))
{
    input.Size = "S";
}
else if ((input.Square  >=  900)  &&  (input.Square  <  1100))
{
    input.Size = "M";
}
else if ((input.Square  >=  1100)  &&  (input.Square  <  1300))
{
    input.Size = "L";
}
else if ((input.Square  >=  1300)  &&  (input.Square  <  1500))
{
    input.Size = "XL";
}
else if ((input.Square  >=  1500)  &&  (input.Square  <  1800))
{
    input.Size = "XXL";
}
else if (input.Square  >=  1800)
{
    input.Size = "XXL";
}


but it works only for one row (separetly) in table, not for all rows at the same time.