The specifications for a refrigerator part (in cm) are 5.00 ± 0.10, and the Taguchi loss function is estimated to be L(x) = 7,500 (x - T)2. Determine the estimated loss per part if the quality characteristic (i.e., actual process performance) under study takes on a value of 4.91 cm.

a. More than $50 but less than or equal to $70
b. More than $70 but less than or equal to $90
c. More than $90
d. More than $30 but less than or equal to $50