Final answer:
The cost (C) as a function of the number of items (n) can be determined using the equation C = 5.50n + 250. The cost increases by $5.50 for each item, along with a fixed cost of $250.
Step-by-step explanation:
The cost (C) as a function of the number of items (n) can be represented by the equation C = 5.50n + 250.
This means that for each item, the cost increases by $5.50. Additionally, there is a fixed cost of $250.
For example, if there are 10 items, the cost would be C = 5.50(10) + 250 = $305.