human
Oliver owns a laundry shop, and he charges $2 per kilo of laundry. Two days ago, his shop washed a total of 5 kilos of laundries. Yesterday, it washed five kilos of laundries more than the previous day. Today, it washed twice the number of kilos than yesterday.  How much did he earn for three days?
assistant
How many kilos of laundry did his shop wash yesterday? ** Yesterday, his shop washed 5 + 5 = <<5+5=10>>10 kilos of laundry.
How many kilos of laundry did his shop wash today? ** Today, it washed 2 x 10 = <<2*10=20>>20 kilos of laundry.
How many kilos of laundry did Oliver's shop wash for three days? ** Thus, Oliver's shop washed a total of 5 + 10 + 20 = <<5+10+20=35>>35 kilos of laundries for three days.
How much did Oliver's shop earn for three days? ** Therefore, his shop earned 35 x $2 = $<<35*2=70>>70 for three days.
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