Answer:
The price you should sell your skateboards so that there is neither a shortage nor a surplus is $70
Explanation:
In order to calculate the price should you sell your skateboards for so that there is neither a shortage nor a surplus we would have to make the following calculation:
−6p + 400= 4p − 300
-10p=-700
p=70
The price you should sell your skateboards so that there is neither a shortage nor a surplus is $70