Yes, if the time of delivery is specified, the number and description of the product is well known.

In my area there is a business transaction system. Normally, Bricks (building material) are manufactured in Dec/Jan. In Dec/Jan, the normal price is 150 USD per 2000 Bricks. But, if someone pay in 3-4 advance before the season (Sept/Oct). Then, price is 30-40 % cheaper (around 100 USD per 2000 Bricks). Is it permissible in Islam?

Jobs | November 23, 2016 4:25 pm
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I intend to study accountancy. One part of accountancy is auditing, and this is related to interest-related calculationsetc during job. Is this Halal? Please consider that I shall not be decision maker as to decide to take interest-bearing loan, no, and as a Muslim, I hate bank interest. However, since the acc job entails interest-related calculations,would my acc job income Halal?
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I sell ladies accessories and I have a pair of shoes that are aimed for cat lovers. It has the embroidery of 2 cat eyes,2 ears, a hearth shaped nose, no mouth and cat wiskers. I can send a picture of the product if necessary. Can I sell such item?