Quik Trip has been selling its pet e-mouse for $41 each. Quik Trip's variable cost is $27 per unit. At that price Quik Trip has been selling 26,262 units per year. Quik Trip is thinking about reducing its price by $4.32 per unit. At the same time, Quik Trip expects to be able to reduce variable cost by $1.66 per unit. By how many UNITS must Quantity demanded change for Quik Trip to just break even on these changes in price and variable cost? (Rounding: tenth of a unit. Use a negative sign if your answer is negative.)