A cloud administrator uses the Google Cloud Pricing Calculator to estimate monthly operati… — Google Cloud Associate Cloud Engineer

A cloud administrator uses the Google Cloud Pricing Calculator to estimate monthly operational expenses for a custom Compute Engine instance running continuously for 730 hours in a billing month. The instance is configured with $4$ vCPUs (billed at $\$0.04$ per vCPU-hour) and $16\text{ GB}$ of RAM (billed at $\$0.005$ per GB-hour). Because the workload runs non-stop, Google Cloud automatically applies a Sustained Use Discount (SUD) of $20\%$ to the combined vCPU and memory compute charges. What is the net estimated monthly compute cost in USD for this instance?

Answer: 140.16 USD

Answer

The net estimated monthly compute cost for the instance is $140.16.

The base vCPU cost is

4 \times 730 \times 0.04 = 116.80

USD and the base memory cost is

16 \times 730 \times 0.005 = 58.40

USD, yielding an un-discounted compute subtotal of

175.20

USD. Applying the

20\%

Sustained Use Discount to the full compute subtotal gives a net cost of

175.20 \times 0.80 = 140.16

USD.

Step-by-Step Solution

Calculate un-discounted vCPU cost

$116.80

Multiply 4 vCPUs by 730 hours and the vCPU hourly rate of $0.04.

Calculate un-discounted memory cost

$58.40

Multiply 16 GB of RAM by 730 hours and the memory hourly rate of $0.005.

Sum total un-discounted compute costs

$175.20

Combine vCPU charges (

116.80) and memory charges (

58.40).

Apply Sustained Use Discount (SUD)

$140.16

Multiply total compute charges by 0.80 to factor in the 20% automated discount for sustained execution.

Key Concept

Estimating monthly Compute Engine costs incorporating automatic Sustained Use Discounts (SUD) for vCPU and RAM usage.

Estimated Time:1m 30s

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