The total years to Joseph's death are 2369.    Now we have used two astronomical synchronisms. We have introduced conception dating with Lamech.  We have pointed out that  when it is stated that someone was born in a given year, that on average it is in the middle of the  year, and the data complied is all within standard deviation.  We also matched the sabbatical  periods to creation, and Jubilee.
         Furthermore, the seven years of plenty, and the seven years of famine, exactly match two  sabbatic periods.  Now, what result will one get for the years from creation to the death of Joseph  if he takes none of this into account?  Will it be any different?  Consider the last famous  chronologer Martin Anstey who didn't have any astronomy to consider:

        "This is so mathematically exact and so absolutely certain, that since Ussher proved that Terah was 130 when Abraham was born, no Chronologer, who accepts the text of the Old Testament, has ever made the period covered by the Book of Genesis from the Creation of Adam to the death of Joseph anything else but 2,369 years.  The only exception is R.G. Faussett, who supposes that Abraham left Haran, not as Scripture says, when his father Terah died, but after an interval of 2 years."
        "The motive for this alteration is to provide the author with material to illustrate his theory of the symmetry of time, so that e.g. each of the 21 7 year periods of Jacob's life may coincide with a year AN. HOM. divisible by the number 7" (The Romance of Bible Chronology, Vol. 1. The Treatise, pg. 116, Martin Anstey, Marshall Brothers, L.T.D.: London, 1913).

         This chronology supports a very important theological truth: life begins at conception, not  birth!  Man dated his age from birth, until Enoch realized that the conventional system was nonsense as soon as he began to think about the wickedness of the human race in murdering its own offspring.   So, he then taught his son to begin counting years for his grandson from conception.  As far as we know, this system was continued until the death of Joseph.
 

         Gen. 18:1 says that the Lord visted during the "heat of the day", hence we assume that it  is high summer.  The birth of Isaac was predicted for the "return of the year" (Gen. 18:10), which is spring.  "Isaac" was the prophesied "seed" of Gen. 15:13, hence we reckon 400 years from this year by the religous year until the Exodus.  The first year is part of a year, viz. 2031.50 b.c.e. to  2030.75 b.c.e.  From 2030.75 to 1631.75 is 399 years, added to the part year counted as a whole makes 400 years. The error parameter here is +/-0 because the Exodus is +/-0, and it is known that Isaac was born in  the spring.  The 400 years make a direct link to the Exodus, bypassing any additive error  parameters in the suceeding generations.  The odds that the error parameter here is {+1 | 0 } is only 1/64.
 

        Sarah was in her 90th year when Isaac was born (Gen. 17:17, 21:5).  Fixing it as 90.50, then she
was born -90.50+0.75c years before in -2120.50.