Answer:
Find out the what is the final price of the tablet computer after it is marked up.
To prove
As given
A tablet computer costs $189.69 including tax.
It is marked up 30%.
30% is written in the decimal form.

= 0.30
Marked up price = 0.30 × 189.69
= $56.907
Final price of the tablet computer after it is marked up = Computer cost including tax + Marked up price
Final price of the tablet computer after it is marked up = $189.69 + $56.907
Final price of the tablet computer after it is marked up = $246.597
Final price of the tablet computer after it is marked up = $246.60(Approx)
Therefore the final price of the tablet computer after it is marked up is $ 246.60 (Approx) .