Sunk costs are sometimes contrasted with prospective costs, which are future costs that may be incurred or changed if an action is taken. In that regard, both retrospective and prospective costs could be either fixed costs (continuous for as long as the business is in operation and unaffected by output volume) or variable costs (dependent on volume). However, many economists consider it a mistake to classify sunk costs as ''fixed'' or ''variable.'' For example, if a firm sinks $400 million on an enterprise software installation, that cost is ''sunk'' because it was a one-time expense and cannot be recovered once spent. A ''fixed'' cost would be monthly payments made as part of a service contract or licensing deal with the company that set up the software. The upfront irretrievable payment for the installation should not be deemed a ''fixed'' cost, with its cost spread out over time. Sunk costs should be kept separate. The ''variable costs'' for this project might include data centre power usage, for example.

is a fixed cost always a sunk cost?

A: no

In April 2018, Mason confirmed that he was leaving Home and Away and had already filmed his final scenes. Mason commented that the role had been ''a dream job'', but it was also ''overwhelming'' playing a main character on the show. The show aired a temporary exit for Ash on 26 April 2018. His final appearance occurred during the episode broadcast on 20 June.

will ash come back to home and away?

A: no

Little Red Riding Hood (1922) is a Walt Disney short cartoon, and is a rendition of the traditional story of Little Red Riding Hood. The film is part of the Laugh-O-Grams series that was released in 1922. This is one of the first ever Walt Disney cartoons, and considered Disney's first attempt at animated storytelling. Rather than using animation cels, it was made mostly by photographing inked lines on paper. The film was considered to be lost for many years and it was listed in 1980 on the American Film Institute's ''10 Most Wanted Films for Archival Preservation''. A print of the film was discovered by a British collector in a London film library in 1998 and was restored the same year.

is little red riding hood a disney character?

A: yes

Copper sulfate is commonly included in children's chemistry sets. It is often used to grow crystals in schools and in copper plating experiments, despite its toxicity. Copper sulfate is often used to demonstrate an exothermic reaction, in which steel wool or magnesium ribbon is placed in an aqueous solution of CuSO. It is used to demonstrate the principle of mineral hydration. The pentahydrate form, which is blue, is heated, turning the copper sulfate into the anhydrous form which is white, while the water that was present in the pentahydrate form evaporates. When water is then added to the anhydrous compound, it turns back into the pentahydrate form, regaining its blue color, and is known as blue vitriol. Copper(II) sulfate pentahydrate can easily be produced by crystallization from solution as copper(II) sulfate is quite hygroscopic.

does copper sulphate dissolved in water to form a blue solution?

A:
yes