Suppose an online electronics retailer is running two different specials. one deal

Suppose an online electronics retailer is running two different specials. one deal will get you 10% off your total purchase and the other deal is worth $20 off a purchase of $100 or more. assuming you spend at least $100, if you are allowed to use both deals, in which order do you want to apply them? try the calculation both ways with a few different prices, or write a formula to represent each option.