The man-hours required (Tn) to manufacture the nth unit in a plant is given by Tn = T1 nb, where b = -0.322 at the 80% learning rate. If the manufacturing time for the first unit (T1) is 80 man-hours, the total time (in man-hours) required to manufacture the first 4 units, at 80% learning rate, is

The man-hours required (Tn) to manufacture the nth unit in a plant is

1.	The man-hours required (Tn) to manufacture the nth unit in a plant is given by Tn = T1 nb, where b = -0.322 at the 80% learning rate. If the manufacturing time for the first unit (T1) is 80 man-hours, the total time (in man-hours) required to manufacture the first 4 units, at 80% learning rate, is
A.	322.11
B.	251.35
C.	103.76
D.	51.19
Answer» C. 103.76