Simple Log Service Subscription provides resource plans in the following specifications: 100 CUs, 1,000 CUs, 10,000 CUs, 100,000 CUs, 500,000 CUs, and 1,000,000 CUs. If none of these specifications meet your requirements, you can combine multiple resource plans.
For example, to get 600 CUs, you can purchase six 100-CU resource plans.