In a batch retort process, a low acid food is processed in a retort at 111C using an F10121.1 = 4 min. Heat penetration data includes: Initial product temp = 80 C, fh (heat rate constant) = 20 min, jc (cooling rate factor) = 1.80 min. Pseudo-Initial product temp. is 41C. How long do we process a low acid food at 111C, when the microorganism has a F 10 121.1 = 4 min. Also, for the lag time (l) value, it is 15 min.