Respuesta :
if she bought 4 for 1$ and sells 2 for 1$ that means she sells 4 for 2$ so every 4 she buys she makes 1$ so in order to make 5$ their must be 5 x 4bars so 20bars must be bought
if she bought 4 for 1$ and sells 2 for 1$ that means she sells 4 for 2$ so every 4 she buys she makes 1$ so in order to make 5$ their must be 5 x 4bars so 20bars must be bought