Question 1:
70 x 1.30 is 91 - 70 is equal to 21 pizzas, they would have to sell 91 total pizzas, which is 21 more than what was sold the previous day
Question 2:
 Both parts are solved below: 
 
Step-by-step explanation: 
 
Given: 
 
Purchase price = 150 
 
Part A 
 
As the online trailer marks up 30% so the price would be: 
 
= 150 + 30% of 150 
 
=150 + 0.3(150) 
 
= 150 + 45 
 
Price online= $195 
° ♡ ₒ ♡ °
Part B
 
As the superstore marks up the price by 40% so the price would be: 
 
= 150 + 40% of 150 
 
=150 + 0.4(150) 
 
= 150 + 60 
 
Price at superstore = $210 
 
° ♡ ₒ ♡ °
 
Difference
 
Difference = price at superstore - price online 
 
Difference = 210 - 195 
 
Difference = $15 
 
Difference in markup = 40% - 30% = 10% 
 
So a 10% difference leads to the difference of $15 in price.