The Optimization of Transportation Costs in Logistics Enterprises with Time-Window Constraints

Table 1

The situation of vehicles in the logistics enterprise S.

Vehicle model			Quantity
a	15 ton/59 m^3	0.2 yuan/kg	2
b	2 ton/15 m^3	0.3 yuan/kg	1
c	25 ton/77 m^3	0.15 yuan/kg	2
d	40 ton/100 m^3	0.1 yuan/kg	2