If Darren bought 4 boxes of crackers, each containing 24 crackers, the total number of crackers that Darren bought is 24*4=<<24*4=96>>96
Twice as many boxes of crackers as Darren bought is 2*4=<<2*4=8>>8
If Calvin bought one box less than twice as many boxes of crackers as Darren, then Calvin bought 8-1=<<8-1=7>>7 boxes of crackers.
The total number of crackers that Calvin bought is 7*24=<<7*24=168>>168
Together, Darren and Clavin bought 168+96=<<168+96=264>>264 crackers.
#### 264