Explain the difference between a Trade discount and Cash discount?​

Explanation:

A trade discount is one that is allowed by the wholesaler to the retailer, calculated on the list price of the product, whereas cash discount is allowed to stimulate instant payment of the goods purchased. The main difference between trade discount and cash discount is that ledger account is opened for a cash discount, but no for a trade discount.

the correct answer would be b, when, queen, calder hall and london.

explanation:

we always capitalize words when a paragraph or sentence is starting, when an important name is used, when a place is being written, or simply when a noun is used, etc. so in this sentence, sentence is starting from 'when', so it will be written in capital letters. secondly, queen is considered to be an important person, so it will also be written in capital letter. next, the name of the town is mentioned, i-e calder hall, which will also be written in capital letters. in the last,   city name is being used, 'london', which will also be written in capital letters. so option b is the most appropriate one.