Automatically Generating 'Tiers' after Input Range

I have to split the Variable range into tiers. I would like the Tiers to automatically generate based on the Peak and Base, which would be independently entered. Please help! Thank you!

(Input)
Peak Capacity 550
Base Capacity 300

(Output)
5 Tiers would be:
Tier 1 = 300 - 350
Tier 2 = 351 - 400
Tier 3 = 401 - 450
Tier 4 = 451 - 500
Tier 5 = 501 - 550