The math club makes 35 bars of laundry soap a week and sells these at $20 each before the soap could be sold, the pupils found that 6 bars were destroyed by mice. How much will the total sale at the end of a four week month?

Step-by-step explanation:

The math club makes 35 bars of laundry soap a week and sells these at $20 each. This means that the total number of bars of laundry soap made in a 4 week month would be

4 * 35 = 140 bars

If the pupils found that 6 bars were destroyed by mice, the total number of bars of soap left would be

140 - 6 = 134 bars

Therefore, the total sale at the end of a four week month would be

134 * 20 = $2680