<human>:  A café has a few orders to cook and also needs to makes sandwiches for a group of customers that arrived. 3 local offices have each ordered 10 bacon sandwiches and half of the group that has arrived have asked for 4 bacon sandwiches each. If the café makes a total of 54 bacon sandwiches, how many customers are in the group of customers that arrived?
<bot>: How many sandwiches did the offices order? ** The offices ordered a total of 3 offices * 10 sandwiches each = <<3*10=30>>30 sandwiches.
How many sandwiches did the group of customers order? ** So the group of customers must have ordered 54 total sandwiches – 30 sandwiches for the offices = <<54-30=24>>24 sandwiches.
How many customers ordered a sandwich? ** This is a total of 24 sandwiches / 4 sandwiches per customer = <<24/4=6>>6 customers who ordered a sandwich.
How many customers are in the group of customers that arrived? ** As only half the group ordered a bacon sandwich, the entire group must have consisted of 6 customers * 2 = <<6*2=12>>12 customers.
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