1. The problem asks for the answer per casilla (per box or unit). 2. To solve this, we need to know the total amount and the number of casillas. 3. The formula to find the answer per casilla is: $$\text{Answer per casilla} = \frac{\text{Total amount}}{\text{Number of casillas}}$$ 4. Without specific numbers, we cannot calculate a numeric answer. 5. Please provide the total amount and the number of casillas to proceed with the calculation.