GRE Quantitative Reasoning - How to find the sale price

1

Jenny is at a store and would like to buy a shirt. The shirt is labelled $\dpi{100} \small 20%$ off, and the store is having a store-wide sale where everything is $\dpi{100} \small 15%$ off. What percent of the original price does Jenny have to pay?

2

A store puts a $200 dress on a 70% discount and then takes an additional 15% off the reduced price. How much of the original price was removed?

3

A department store sells a set of hand weights for $X. If the store offers a 20% discount on the original price of the weights, and then an additional 10% employee discount, what will be the price of the weights if an employee purchases them?

4

A shirt is originally $20 and marked down 30%. After this it is marked up by 40% then marked down again by 10%. What is its final price?

5

A winter shirt is regularly priced at $50. At the end of the Christmas season, it is marked down by 40%. A month after this initial markdown, it is marked back up by 50%.

Quantity A

The initial cost of the shirt.

Quantity B

The final cost of the shirt, after it is marked up.

6

A dress originally costs $50 but is on sale for 25% off. In addition, you have a 10% off coupon. How much will the dress cost after these discounts?

7

Product X costs $27 to manufacture at the rate of 50 per hour. Production can only be increased in groups of 10 units per hour. For each such increase, the production cost increases 30% of its previous amount. If the output is to be doubled, for how much must each unit be sold to make at least a 25% profit?

8

A retail chain wishes to make at least a profit on a new item. If it can only sell its items for integer values, what is the lowest price it can sell the item for if it costs the chain to purchase it?