Nothing in this division shall prevent an industrial loan company from transacting loan contracts with different borrowers and from contracting for and receiving, up to and including the highest rate of charge permitted by this division at the time of making said loans; provided, however, that if any person is obligated to and does pay more than one loan contract outstanding at the same time, the entire amount of charges paid by such person and received by the industrial loan company on such loan contracts, shall not exceed the maximum that would be permitted by this division if all such loan contracts so paid were combined into one loan transaction.