Final answer:
To find the new sales price of the baseball card, calculate the markup amount by multiplying the original price by the markup percentage. Then add the markup amount to the original price.
Step-by-step explanation:
To find the new sales price of the baseball card, we need to calculate the markup amount and add it to the original price. The markup amount can be found by multiplying the original price by the markup percentage. In this case, the markup percentage is 500%, or 5 times the original price. So, the markup amount is $5.00 * 5 = $<<5*5=25>>25.00. Adding the markup amount to the original price, the new sales price is $5.00 + $25.00 = $<<5+25=30>>30.00.