A paid search campaign generates 1150 impressions, 130 clicks at a cost of $160.25 and yields 13 conversions. Another search campaign generates 1200 impressions, 85 clicks at a cost of $50 and yields 5 conversions. 

Calculate the CPC, the CTR, the CR and CPA for each.

 Evaluate the two campaigns and explain which one do you believe is the better campaign, and why. Show all the math calculations for a full grade.