If Bhavya decides to reinvest the total interest earned from Scheme D in a new scheme offering compound interest at the rate of 12% per annum for 2 years, and Anika decides to reinvest the amount she saved (Rs. 8,000) in a scheme offering 10% simple interest per annum for 4 years, what will be the difference in the amounts received by Bhavya and Anika at the end of their respective investment periods?

Anika and Bhavya invested the same amount, Rs. (P), in two different schemes, C and D, respectively, for 2 years. Scheme C offers a 15% simple rate of interest, while Scheme D offers a 15% annual compound rate of interest. The difference between their interest amounts is Rs. 4050. Out of the total interest received by Anika, she spent (Q)% on travel, 30% on electronics, 20% on home decor, and the remaining Rs. 8000 she saved. From the total amount Anika spent on electronics, she spent Rs. (R) on a new laptop. With the remaining amount, she bought a smartphone at a 25% discount, which was marked Rs. 4000.