smc

If there are $x$ pennies in the bag, then there are $2x$ dimes and $3(2x)=6x$ quarters. Since pennies are $\text{textdollar}0.01$, dimes are $\text{textdollar}0.10$, and quarters are $\text{textdollar}0.25$, the total amount of money in the bag is $$\text{textdollar}\left(0.01x+(0.10)(2x)+(0.25)(6x)\right)=\text{textdollar}1.71x.$$ Therefore, the possible amounts of money are precisely the integer multiples of $\text{textdollar}1.71$. Since the answer choices are all integer numbers of dollars, we multiply by $100$ to deduce that the answer must be an integer multiple of $\text{textdollar}171$. The only such multiple among the answer choices is $\text{textdollar}(2\cdot 171)=\boxed{\text{textdollar}342}$.