To calculate the required average sales per day for the next month with a 10% increase, you'll need to multiply the current average sales per day by 1.10.
Current average sales per day = 55
Increase percentage = 10%
New average sales per day = Current average sales per day * (1 + Increase percentage)
New average sales per day = 55 * (1 + 0.10) = 55 * 1.10 = 60.5
Rounding up to the nearest whole number, you would need to be up to 61 sales per day for the next month to meet the 10% increase requirement.