terminal has four customers that need delivery by truck. The customers have the following demand:

Customer Demand

$15$ tonnes

$29$ tonnes

$37$ tonnes

$411$ tonnes

The truck load capacity is $15$ tonnes. The distances $($km$)$ between the customers and the terminal are:

Terminal Customer $1$ Customer $2$ Customer $3$ Customer $4$

Terminal $-$

Customer $1120-$

Customer $29040-$

Customer $31402030-$

Customer $4180154560-$

$4$a$.$ Calculate the driving distance savings matrix. Disregard from any load capacity issues at this point.