Trabajos de excel

https://dl.dropbox.com/s/lpnfmbvfynxsc3j/ejercicio%2025.xlsx?https://dl.dropbox.com/s/xqd7ubt9efzs9tg/xxxxxxxxx.xlsx?https://dl.dropbox.com/s/qoaxeyoxgoa1j85/ejercicios%20del%2021%20al%2024%20excel.xlsx?
https://dl.dropbox.com/s/intw1e26u9sd0tb/BASE%20DE%20DATO%201D.xlsx?dl=1