How conversion rate multiplies your PPC efforts

What would be the impact on your CPA and conversions if you improved the conversion rate, next to improving PPC metrics? Once you find out, you'll admit it's a sin not to work on your conversion rate.

The starting number of monthly impressions from your PPC campaigns (at least 10,000)
The current CTR that applies to the monthly impressions (at least 0.5%).
The current average CPC that applies to the clicks from your PPC campaigns (at least $0.10).
The current conversion rate that applies to the clicks of your PPC campaigns (at least 0.5%).
The expected relative monthly increase (or decrease) in PPC impressions.
The expected relative monthly increase (or decrease) in CTR.
The expected relative monthly increase (or decrease) in CPC.
The expected monthly relative increase (or decrease) of your conversion rate. If you don't plan efforts in conversion rate optimization, set this to 0%
Monthly investment besides ad spend for PPC and CRO, such as hiring people and licensing technology. This amount won't be used in this calculator. It's for your own ROI calculation based on the results, so you can determine if it would be worth this investment.

Increase in Monthly Conversions

Without CRO
With CRO
Conversions difference

CPA of Additional Conversions

Without CRO
With CRO
CPA difference

Optimizations

CPC
CTR
Conversion Rate (with CRO)

CPA & Conversions

CPA (with CRO)
Conversions (with CRO)

Monthly Breakdown