Answer:
€9.31
Explanation:
Let x be the price of the calculator.
The VAT applied is equal to 19% of the calculator's cost. In algebraic form, this would be 0.19x.
The total price for the calculator, including the applied VAT, can be expressed as
.
We know that this total is equal to €58.31, therefore we'll equate the two expressions and solve for x.

The price of the calculator is €49.
Therefore, the VAT applied is equal to 49 * 0.19 = €9.31