Final answer:
Charities can sell items at lower prices than for-profit bookshops because they may not have to charge VAT, which is a tax added to the price of goods sold by VAT-registered businesses. VAT increases the cost to customers, whereas VAT-exemption for charities allows for competitive pricing.
Step-by-step explanation:
A direct answer to the question is that charities, by not charging VAT, enable themselves to offer lower prices than for-profit second-hand bookshops that do charge VAT. The given assumption is that VAT increases the price customers pay for items. VAT (Value-Added Tax) is a consumption tax levied on the sale of goods and services, including second-hand items. When a business sells a product or service, it must charge VAT on top of the sale price, assuming it's registered for VAT and the product is not exempt or zero-rated.
When charities sell goods, they usually do not have to charge this tax, which means they can offer goods at a price that does not include this tax component. Thus, charities have a competitive advantage in pricing over businesses that must charge VAT. It is important to note, however, that not all second-hand goods sold by charities are VAT-exempt; it depends on the nature of the goods and the charity's VAT status.