1.Noun phrase as subject: "Pricing issues" serves as the subject of the sentence, using a complex noun phrase to describe a common problem, enhancing the depth and complexity of the expression.
2.Cause and effect structure: "leading to confusion and uncertainty" uses a cause and effect structure to explain the impact of unclear pricing, demonstrating a sophisticated understanding of sentence structure.
3.Present participle as an adjective: "unexpected additional costs" uses the present participle "unexpected" as an adjective to describe "additional costs," adding descriptive power and complexity to the sentence.
4.Complex sentence with conjunction: "Moreover, locating discounts or promotions can be difficult, adding another layer of frustration to the shopping experience" uses a complex sentence structure with the conjunction "Moreover" to introduce an additional point, showcasing advanced grammar skills.