Answer:
(a) The utility formula is U = 5C+10T,
Where C is the cost
T is time (hours).
Calculate of the value of U by putting the values of C and T,
U = 5C+10T
For truck U = 5(25)+10(16)
For truck U = 125+160
For truck U = 285
U = 5C+10T
For rail U = 5(17)+10(25)
For rail U = 85+250
For rail U = 335
Conclusion: Then shipper should select truck mode.
(b) Other factors that the shipper should take into account in making this decision are:
1. Total landed cost
2. Nature of the product
3. Government regulations and policies