Who knows about perpetual inventory and periodic inventory system in accouting?

Who knows about perpetual inventory and periodic inventory system in accouting?
Could you please help me to slove the following quiz?Thanks!

The perpetual inventory system has the following advantage/s over the periodic system:

1. Lower cost of operation 2. Elimination of theft of inventory 3. Physical stocktakes become unnecessary 4. Cost of goods sold details available when required 5. All of the above

Which advantage/s does the periodic inventory system have over the perpetual system?

1. Cost of goods sold figure readily available 2. Shoplifting by customers is detected 3. Recording is simpler 4. Physical stocktake unnecessary 5. All of the above

Thanks!

Answer:
Question 1: 4. Cost of goods sold details available when required
Question 2: 3. Recording is simpler

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