Every week the stores sells j jeans and t T - shirts.
\The stores makes for each T - shirt is 8 dollars.
\The stores makes for t T - shirt is 8t dollars.
\The stores makes for each pair of jeans is 12 dollars.
\The stores makes for j jeans is 12j dollars.
\The total amount of money, the store makes every week is 12j + 8t.
The option B is correct answer.