Capital One Sr. Business Analyst interview questions

Capital One initiated conversation with me based on LinkedIn profile. First round interview was with HR followed by a phone case and a "Power Day" onsite. During all cases (3 in total), I made small mistakes but tried to continue conversation with the interviewer to get back on track. This worked in the 2nd round interview but I think was the downfall in the final round. Other reviews might say that the numbers and final answer do not matter but I felt my reasoning and discussion were solid - so I can only attribute it to calculation errors.