Is buying on installment at a higher price considered riba (usury or interest)?

The questioner:
May Allah reward you. He says: We are owners of mills, and due to the drought, we take a ton of barley from the government supply for seventy-seven dinars, and we take it from merchants on credit for a period of eight months, with the difference for that ton being thirty-six dinars. Is this riba (usury or interest) or not?

The Shaykh:
This is not riba (usury or interest), as long as the seller is different; he sold to a government entity at a reduced price, and if you take it from a commercial entity

The presenter:
With Allah's permission.

The Shaykh:
at a higher price, then the two contracts are different; the two contracts are different, so that does not fall under riba (usury or interest). Yes.