OK, here's what I got:
# Units # Units
Tape (NIST) 30.00948 meters at 20.00 C convert 68.00 F
Measured
Partial 4.80180 m
10 Full 300.00
Course Raw 304.80180 at 42.00 F
Divide 30 / NIST
NIST Corrected 304.70551 m
T dif F
Factor 1.00 plus 26.00 times 0.00000645 1.00016770
Corrected 304.7566122
Oscar