Discussion: fueling scales Assume that 2,250 chargers currently arrive at the facility each year, 65% of whom purchase an average of 225 gallons. This will result in sales of 230,000 gallons per year, which at $1.35 average gross margin would generate $310,500 in gross profit. If we can generate modest increases in pick up ratio to 67% and average rise to 235 gallons, we can increase the gross profit contribution to $478,250. What is the impact of improving financial performance on the cost of doing business?