Answer:
A is 10 dollar cheaper than B
Explanation:
A : 40 dollars plus 45*2=90
90+40= 130 dollars
B:100 dollars 45*1=45
100+45= 145 dollars
A is 15$ cheaper than b
A= 40+(45*2) = 40+90=130$
b= 100+45 =145$
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