To whom does the responsibility fall for the costs of renewing worn-out equipment in a restaurant leased for 7 years, taking into account the contract clause "return the premises in the same condition as received (equipment and building)," with a monthly rent of $1000 and renewal costs that could reach $5000?

If the leased equipment wears out from normal use, its renewal is incumbent upon the lessor. The lessor's condition that the lessee return the premises and tools as they were received has no effect, because this condition is void and contrary to the nature of the contract, leading to uncertainty, as the maintenance of the leased asset is the responsibility of its owner.