In order to move items from the sack, to your warehouse, you must first:

1. Once you've collected the produce you need to click on the sack.

2. The click separate "truma and maaser".

3. With the arrows on the right side, move the item over the pipe.

4. Choose the amount you will separate by clicking on the numbers

To learn about truma and maaser click 1 and 2

5. Now pull the string.

If that did not work, check that you gave the right amount, and try again.

בהצלחה!!!