Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to ship foods with dry ice [title] Purchase packages of dry ice. [step] Before you can pack materials using dry ice, you'll have to purchase some. You can buy packages of dry ice at most butcher shops and grocery stores.

Ending1: Pay attention to how dry the dry ice is, how often it has been used, and how dry it is going to be when loading food. [substeps] Dry ice becomes compacted when it is moved. Ending2: Dry ice will typically be made at freezing temperatures above 20 ° f (16 ° c). It will then be encased in plastic or glass and transported to the freezer. Ending3: Dry ice is sold in two bins, a pole and window. The pole is the smallest type of ice you can fit into your cooler. Ending4: Some ups stores or fedex stores may sell dry ice. [title] Get the right quality material for packing.

Answer format: ending1/ending2/ending3/ending4