The manufacturing cost of a cell phone was $136. sellers first marked up the cost by 25 percent. sales were poor, so sellers decreased the markup to 17 percent. calculate the old and new selling prices given the following equation: selling price = original cost + markup value.

a.) old price was $170, new price is $164.90
b.) old price was $150.12, new price is $117
c.) old price was $170, new price is $159.12

The correct answer is:

C.) old price was $170, new price is $159.12

Explanation:

The original price was $136. For a 25% markup, this means the amount of markup is 0.25(136) = 34. This makes the new price 136+34 = $170.

When they mark the price down to a 17% markup, this means the price is 0.17(136)+136 = 23.12+136 = $159.12.

After solving the problem, I am able to come up with the following conclusion that the old price was $170, new price is $159.12. The correct answer between all the choices given is the last choice or letter C. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

the answer is 62