If Selling Price is 9 per unit, variable cost is 5 per

One who knows everything

A strongbox or small chest for holding valuables.

Select the correct Antonym of the given word.

adversary

Swindle

Find the word with the appropriate similar meaning of the word in Italic from the options given:

His jovial demeanor brightened up the room.

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Affliction

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Native

Choose the word that means the same as the given word.

Obligation

One who always looks at the brighter side

Select the most appropriate meaning of the given idiom

Once in a blue moon