Hi,
Being short and precised, below are following points which makes me best suitable for this job role:
1. I am a Software test engineer by profession. Hence, my excel skills are way much better.
2. I am new to this freelancing field. Hence, behind money i will also work for positive feedback and appreciation from your side.
As, i don't know what volume of data you have, hence i have made a 10 days window. But based on requirements, days can be shortened for sure.