Johnny makes his signature crab dish 40 times a day.  It uses 1.5 pounds of crab meat.  Crab meat sells for $8 per pound.  How much does he spend in a week if he is closed 3 days a week?
He uses 40*1.5=<<40*1.5=60>>60 pounds of crab meat per day
That cost 60*8=$<<60*8=480>>480 per day
He is open 7-3=<<7-3=4>>4 days a week
So he spends 480*4=$<<480*4=1920>>1920 a week
#### 1920