Math Problem (Level 2) : Four empty bottles for one new bottle (II16)

Juice is sold at 100 yen per bottle at a certain store and if you bring four empty bottles to the store, you can get one new bottle.

For example, you can drink nine bottles of juice if you have 700 yen.

(1) Find the number of bottle of juice which you can drink with 1900 yen.

(2) Find the fewest amount of money that you can drink 90 bottles of juice.

Answer

(1) 25 bottles
(2) 6800 yen