<human>:  Richard can clean his room in 22 minutes. Cory takes 3 minutes more than Richard to clean her room while Blake can clean his room 4 minutes more quickly than Cory. If they have to clean their rooms twice a week, how many minutes do all three spend cleaning their rooms each week?
<bot>: How many minutes does Cory take to clean her room? ** Cory takes 22 + 3 = <<22+3=25>>25 minutes to clean her room.
How many minutes does Blake take to clean his room? ** Blake takes 25 - 4 = <<25-4=21>>21 minutes to clean his room.
How many minutes do Richard, Cory and Blake take to clean their rooms? ** The three of them can clean their room in 22 + 25 + 21 = <<22+25+21=68>>68 minutes in all.
How many minutes do Richard, Cory and Blake spend cleaning their rooms each week? ** In a week, they spend 68 x 2 = <<68*2=136>>136 minutes cleaning their rooms.
#### 136