Bob Collingsworth the III has a $30 online gift voucher. He plans to buy as many books on the secret art of booger flicking as he can. The cost of each book is $4. There is also a single shipping charge of $2. What inequality best fits describes how many books he can order?
4x + 2 < 30
4x + 2 < 30
4x + 2 > 30
4x + 2 > 30