The firm bought different types of material from the same supplier. The firm bought 250 units of material A, total volume of material A is 99 m3. The firm bought 385 units of material B, total volume of material B is 135 m3. The firm bought 160 units of material C, total volume of material C is 66 m3. The firm paid 900 TL for the transportation. Transportation cost is allocated to the materials based on volume. What is the unit transportation cost allocated to material A?

Select one: a. 1.58 TL per unit b. 1.05 TL per unit c. 1.19 TL per unit d. 1.24 TL per unit