Lucia wants to buy some posters over the internet. each poster costs $6.67 and has a shipping cost of $9.99 per order. if lucia wants to spend no more than $30 for her posters, which inequality shows the maximum number of posters, p, that she can buy? 9.99 − 6.67p ≤ 30, so p ≤ 2 9.99 + 6.67p ≤ 30, so p ≤ 3 9.99p + 6.67p ≤ 30, so p ≤ 4 9.99p − 6.67p ≤ 30, so p ≤ 5