How to solve this publishing company math problem?

A small publishing company is planning to publish a new book. The production costs will include one-time fixed costs (such as editing) and variable costs (such as printing). The one-time fixed costs will amount to $29,673 The variable costs will be $12 per book. The publisher will sell the finished product to bookstores at a price of $18.75 per book. How many books must the publisher print and sell so that the production costs will equal the money obtained from sales?How to solve this publishing company math problem?
29673/(18.75-12)