Toll estimation system

Claim 1

A SYSTEM FOR ESTIMATING PARKING REVENUES ACCRUING WITH THE PASSAGE OF TIME FOR A VARIABLE NUMBER OF VEHICLES PARKED WITHIN A GARAGE OR OTHER PARKING AREA, DIGITAL MEANS DIFFERENTLY RESPONSIVE TO EACH VEHICLE ENTERING AND EACH VEHICLE LEAVING SAID PARKING AREA TO THEREBY REGISTER AT EACH INSTANT THE EXACT NUMBER OF VEHICLES IN SAID PARKING AREA, A SECOND DIGITAL COUNTER BEING OPERATED AT REGULAR INTERVALS FROM A RE-SET CONDITION TO A CONDITION WHERE ITS REGISTERED COUNT CORRESPONDS EXACTLY WITH THAT WHICH IS THEN REGISTERED IN SAID DIFFERENTIAL COUNTING MEANS, AND DIGITAL CUMULATIVE COUNTING MEANS GOVERNED BY SAID SECOND DIGITAL COUNTER AND BEING OPERATED EACH TIME SAID SECOND COUNTER IS OPERATED BY SAID TIMING MEANS TO ADD TO THE COUNT ALREADY STORED IN SAID CUMULATIVE COUNTING MEANS AN AMOUNT PROPORTIONAL TO THE NUMBER OF VEHICLES THEN IN SAID PARKING AREA.