Final answer:
The statement about low level coding is false as 'low level coding' is not defined in the given context, and there's no correlation provided between coding and T-shirt prices.
Step-by-step explanation:
The statement "Low level coding represents items less than $18 per unit" is false. In the context of the information provided, 'low level coding' or any 'level coding' is not mentioned, and there is no indication that it should represent the price of items. Instead, the provided examples refer to the selling price of T-shirts, which may be above or below $18, depending on the scenario. For instance, Coolshirts sells T-shirts at a price of $9 each, which is indeed less than $18. However, without further context about what 'low level coding' refers to, we cannot assert that it represents items less than $18 per unit.