Maximum deliveries depending on skill and delivery distance

Skill 1-2: maximum 10 packages, distance between 500 and 750 units. Skill 3-4: maximum 20 packages, distance between 750 and 1.000 units. Skill 5-6: maximum 30 packages, distance between 1.000 and 1.250 units. Skill 7-8: maximum 40 packages, distance between 1.250 and 1.500 units. Skill 9-10: maximum 50 packages, distance between 1.500 and 2.000 units.