Najafi Q&A: Things Included in Khums

One of my relatives gave me a gift, and I sold it and spent its price on my living expenses before the arrival of my khums year. Is khums obligatory in this case?

Is Khums obligatory on books that a student bought with his monthly allowance but has not read?

What is the ruling regarding a piece of unfenced land concerning Khums? Is Khums due on it?

If experts differ in the value of the property that its owner intends to donate, with some stating its price as $50,000, others as $70,000, and some claiming it to be $90,000, should we consider the average price or the highest prices?

If I bought something but didn't use it, and then someone borrowed it from me to use, and it remained with them for a whole year while I didn't use it, is it obligatory to pay khums on it?

If I bought something but didn't use it, and then someone borrowed it from me to use, and it remained with them for a whole year while I didn't use it, is it obligatory to pay khums on it?

If someone has collected some items such as metal cans, plastic and other waste dumps for the purpose of selling them and stayed for more than a year, are these included in the Khums?

If the house is built for the purpose of sustenance and no one lives there until the end of the Khums year, at what price the Khums should be taken out?

Things that are counted as parts of provision as clothing and electrical appliances, if left for more than a year will the Khums becomes applicable to them?