Answer:
First you multiply 1200 by .06. Then subtract the answer from 1200. Next multiply 1350 by .07 and subtract the answer from 1350. Last subtract the amount for store a from store b. Shopping at Store B would save you $127.50
store a: 1200 x.06= 72
1200-72= 1128
store b: 1350×.07= 94.5
1350-94.5=1255.5
store a and b: 1255.5-1128=127.5
Store B saves 127.5
It is a method where we find the value of a single unit from the value of multiple units and the value of multiple units from the value of a single unit.
First, let us make a note of the information we have. There are 5 ice-creams. 5 ice-creams cost $125.
Step 1: Let’s find the cost of 1 ice cream. In order to do that, divide the total cost of ice-creams by the total number of ice-creams. The cost of 1 ice-cream = Total cost of ice-creams/Total number of ice-creams = 125/5 = 25. Therefore, the cost of 1 ice cream is $25.
Step 2: To find the cost of 3 ice-creams, multiply the cost of 1 ice cream by the number of ice-creams. The cost of 3 ice-creams is cost of 1 ice-cream × number of ice-creams = 25 × 3 = $75. Finally, we have the cost of 3 ice-creams i.e. $75.
Given:
Repair charges= 1200
sales tax= 6%
Store B:
Repair charges= 1350
Sales tax= 7%
For store A:
=1200 x.06= 72
Money =1200-72= 1128
For store B:
1350×.07= 94.5
Money = 1350-94.5=1255.5
Now,
Money saved,
store a and b: 1255.5-1128=127.5
Hence, Store B saves 127.5
Learn more about Unitary method here:
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