Should the student pay the remaining 7,0 Sudanese Pounds to the university after a computer error, or should he pay 300 dollars, which is the original annual tuition fee, knowing that the value of the dollar is unstable?

It is obligatory to pay the actual tuition fees regardless of the dollar's value. It is not permissible to rely on a computer error to reduce the university's right, as that is a betrayal of trust. Allah Almighty says: {O you who have believed, do not betray Allah and the Messenger or betray your trusts while you know [the consequence]}, and the Prophet, peace and blessings be upon him, said: "He has no faith who has no trust, and he has no religion who has no covenant."