An entry window would train inexperienced users (especially non-accountants) in double-entry bookkeeping and the finer points of recording financial transactions properly.
The 2012 cycle gave me a gross profit rate of 13%. 2013 gave me a 19% gross profit rate. The perfectly symmetric bars of 2014 gave me 34%.
These tells me I'm learning and making better decisions. I'm using resources more efficiently. I'm getting 34 pesos for every 100 pesos as profit. By the way, the 3rd group of bars isn't complete yet. It's only 5 months, 7 more months to go.