Update 200 Cloud IPs.md (#1300)

Clarify the number of IPs needed per instance and fix formatting

Author: Vmihajlovic

src/data/markdown/docs/03 cloud/07 Cloud reference/200 Cloud IPs.md

@@ -55,13 +55,17 @@ If your tests have specific requirements, contact k6 support for a custom soluti
 k6 has 3 tiers of hardware for load generation.
 The tier k6 chooses depends on the number of VUs allocated to a load zone.
 
+First step is to determine the number of VUs per load zone.
+
 - Tier 1 when the load zone has 1-999 VUs
 - Tier 2 when the load zone has 1000-4001 VUs
 - Tier 3 when the load zone has 4001-5000 VUs
 
-Tier 1 instances can host up to 300 VUs
-Tier 2 instances can host up to 1200 VUs
-Tier 3 instances can host up to 5000 VUs
+Second step is to determine the number of VUs per instance.
+
+- Tier 1 instances can host up to 300 VUs
+- Tier 2 instances can host up to 1200 VUs
+- Tier 3 instances can host up to 5000 VUs
 
 Regardless of the tier, the amount of resources (CPU, Memory, Network) per VU is the same.
 For example, if you start a test with 400VUs, k6 uses 1 Tier 1 server,