iULIT 23 Kedai Moong mempunyai stok 4000 buah buku nota dan 8000 batang pen. Kedai itu menawarkan set kombo yang terdiri daripada satubukudan dua batang pen. Set kombo tersebut dijual pada harga RM \( (2 j+5 k) \). Ungkapkan hasil jualan set kombo tersebut dalam sebutan \( j \) dan \( k \), jika semua set kombo berjaya dijual. Kedai Moong has a stock of 4000 notebooks and 8000 pens. The store offers a combo set consisting of one notebook and nur pens. The combo set is sold at a price of RM( \( 2 j+5 k \) ). Express the total sales from the combo set in term of \( j \) and \( k \), if all the sets are successfully sold. A \( 8000 j+20000 k \) B \( 8000 j+40000 k \) C \( 4000 j+10000 k \) D \( 4000 j+20000 \mathrm{k} \)
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