more examples

learn/billing/examples.mdx

@@ -100,7 +100,7 @@ A customer doing real estate lead generation is looking to use Vapi to automate
 
     <br/>
     <Frame caption="The customer will be using GPT-4 & making outbound phone calls.">
-      <img src="/static/images/learn/billing/custom-model-outbound-phone-example.png" />
+      <img src="/static/images/learn/billing/outbound-phone-example.png" />
     </Frame>
     <br/>
 
@@ -129,6 +129,54 @@ A customer doing real estate lead generation is looking to use Vapi to automate
   </Step>
 </Steps>
 
+### Mock Intervieweing Application (Web)
+
+A web engineer is looking to develop a website that helps job candidates practice for job interviews. They are looking to use Vapi for their virtual interviewers:
+
+<Steps>
+  <Step title="Scenario">
+    "Hi, I'm looking to develop a web application for mock interviews. Users will be able to practice for a variety
+    of job interviews with AI interviewers.
+
+    Interviews will be 30-minutes each (at max), for model I'll be using a custom open-source model hosted with Baseten & for voice I'll be using PlayHT.
+
+    How much would this cost me each month if I service 1,000 interviews per month?"
+
+  </Step>
+  <Step title="Providers">
+    <div>**Deepgram:** transcription</div>
+    <div>**Custom Model:** model</div>
+    <div>**PlayHT:** voice</div>
+
+    <br/>
+    <Frame caption="The customer will be using a custom model & making web calls (no telephony will be involved).">
+      <img src="/static/images/learn/billing/web-interviews-example.png" />
+    </Frame>
+    <br/>
+
+  </Step>
+  <Step title="Cost Breakdown">
+    <div>**Deepgram:** ≈ \$0.01/min</div>
+    <div>**Custom Model:** ≈ \$0.10/min (vague assumption, can vary widely)</div>
+    <div>**PlayHT:** ≈ \$0.07/min</div>
+    <div>**Vapi:** \$0.05/min</div>
+
+    <Tip>Our [estimating costs](/learn/billing/estimating-costs) guide can help you determine these values.</Tip>
+
+  </Step>
+  <Step title="Final Estimate">
+    Call Minutes / Month: 1,000 calls x 30 min/call = **30,000 call minutes**
+
+    <div>**Transcription:** \$0.01/min x 30,000 = **\$300**</div>
+    <div>**Model:** \$0.10/min x 30,000 = **\$3,000**</div>
+    <div>**Voice:** ≈ \$0.07/min x 30,000 = **\$2,100**</div>
+    <div>**Vapi:** \$0.05/min x 30,000 = **\$1,500**</div>
+
+    **Total**: **\$6,900**/mo
+
+  </Step>
+</Steps>
+
 ### Further Reading
 
 <CardGroup cols={2}>