What can I do at the Dry Goods Store?

Remember the fish weighing? (Good times.)

There are again three scales here.

And pre-weighed SACKS ready to use.

Notice a series of three numbers anywhere?

They're carved on the front of the table.

30, 40, 70.

Try and place the sacks on the scales so you get those readouts.

Does it seem impossible?

Keep in mind that it's okay to place weights over a 100 on a scale.

The needle will make a full circle and only show the part of the weight that exceeds a 100.

(SOLUTION FOLLOWS)

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Place the sack labeled 30 on the first scale, the sacks labeled 80 and 60 on the middle scale, and the sacks labeled 20 and 50 on the third scale.

Watch as the cheeses lift to reveal a cellar door.

Can you find the KEY anywhere in the store?

Try the barrels. See it now?

It's in the OLIVES, masquerading as a scoop.

Use the KEY to unlock the corresponding lock (the third one).