Linking drop down boxes

Just input the future data into lower table. Data must be inputted relatively to its column label.

For Examle.
If u wish to write 0,876 for light-Agregate >1 Cement: 3 Sand: 6 Aggregate just write it in fourth row of lower table of corresponding column. Because "1 Cement: 3 Sand: 6 Aggregate" is 4th record.

If all right make this thread solved