Learn Swedish: Butiken får hundra kilo kaffe imorgon. - The store receives a hundred kilos of coffee tomorrow.

In Swedish, you do not use a preposition like "of" between a measurement and the substance being measured. You just put the unit directly before the noun, so it literally reads as "hundred kilo coffee".

Since it is a hundred kilos, shouldn't kilo be in the plural?

When used as an exact unit of measurement after a number, kilo usually stays in its base form. You might occasionally see the plural kilon, but keeping it as kilo is the standard way to express weight.

I thought får meant "is allowed to". Why does it mean "receives" here?

Får has two very common meanings. When it is a helper verb followed by another verb, it means "may" or "is allowed to". But when it is the main verb taking a direct object (like the coffee here), it means "gets" or "receives".

Why doesn't the sentence say ett hundra kilo for "a hundred kilos"?

In Swedish, the words hundra (hundred) and tusen (thousand) can stand alone without ett (one) in front of them. You only add ett if you specifically need to emphasize that there is exactly one, rather than two or three.

Why is the present tense verb får used for something happening tomorrow?