Price and quality are positively correlated. The price of a product is a good indicator of its quality. You always have to pay a bit more for the best. The marketing literature has addressed the use of price as a surrogate for quality as a decision-making heuristic. That is; the higher the price, the higher the quality.
Hence, a drastic fall in the price of a necklace indicates a drastic fall in it's quality.
because a subject is a part of a sentence that contains the person or thing performing the action (or verb) in a sentence so here the subjects are my friend and I
