Ella works in a music shop and earns $45 per day. she earns an extra $3 for each cd she sells. if ella wants to earn at least $60 per day, which inequality shows the minimum number of cds, n, that she should sell? 45 + 3n ≤ 60, so n ≤ 5 45 + 3n ≥ 60, so n ≥ 5 45 + 3n ≥ 60, so n ≥ 12 45 + 3n ≤ 60, so n ≤ 12