Final answer:
To determine the total value of the $20 bills, subtract the number of $10 bills from the total number of bills to find the number of $20 bills (15), then multiply by the value of each $20 bill. The total value is $300, which is not one of the provided options.
Step-by-step explanation:
To calculate the total value of the $20 bills, we first need to determine the number of $20 bills. We are given that there are 35 bills in total and 20 of those are $10 bills. Therefore, the number of $20 bills is 35 bills minus 20 bills, which equals 15 $20 bills.
The total value of the $20 bills can be calculated by multiplying the number of $20 bills by the value of each bill. So, the calculation would be 15 (number of $20 bills) times $20 (value per bill). This equals $300.
Therefore, the correct answer is not listed as an option. The total value of the $20 bills is $300.