### Database Schema:
CREATE TABLE user_reviews (
	App	TEXT	NULL,
	Translated_Review	TEXT	NULL,
	Sentiment	TEXT	NULL,
	Sentiment_Polarity	TEXT	NULL,
	Sentiment_Subjectivity	TEXT	NULL,
	foreign key (App) references playstore (App)
);

CREATE TABLE playstore (
	App	TEXT	NULL,
	Category	TEXT	NULL,
	Rating	REAL	NULL,
	Reviews	INTEGER	NULL,
	Size	TEXT	NULL,
	Installs	TEXT	NULL,
	Type	TEXT	NULL,
	Price	TEXT	NULL,
	`Content Rating`	TEXT	NULL,
	Genres	TEXT	NULL
);

### User's Query:
Which of the app is the best selling app and what is the sentiments polarity of it?

### Extra Knowledge:
best selling app = MAX(MULTIPLY(Price, Installs));
SELECT T1.App, T2.Sentiment_Polarity FROM playstore AS T1 INNER JOIN user_reviews AS T2 ON T1.App = T2.App ORDER BY T1.Price * CAST(REPLACE(REPLACE(Installs, ',', ''), '+', '') AS INTEGER) DESC LIMIT 1