<human>:  Joe's pizzeria has an amazing promotion. If you buy any regular large pizza you can get the next 3 medium pizzas for $5 each. What are your total savings if the regular medium pizza price is $18 and you take full advantage of the promotion?
<bot>: How much money am I saving on each medium pizza? ** If one medium pizza costs $18 and with the promotion I can buy one for $5, then I'm saving $18-$5 = $<<18-5=13>>13 on each medium pizza
How much money did I save in total? ** If I take full advantage of the promotion, that means I bought all 3 medium pizzas, therefore I saved a total of 3*$13 = $<<3*13=39>>39 in total
#### 39