SharedPrefferences is saving only the last value : i try to use SharedPreferences but its only saving the last value.

Main Activity
```
mypreference.setPrice(txtPrice.text.toString().toFloat())
mypreference.setSABV(txtABV.text.toString().toFloat())
```

SharedPreference
```
class myPreferences(context: Context){

    val PREFERENCENAME = "BeerNote"
    val PRICE = 0.0f
    val ALCOHOLBYVOLUME = 0.0f

    val preference = context.getSharedPreferences(PREFERENCENAME,Context.MODE_PRIVATE)

    fun setPrice(price:Float){
        preference.edit().putFloat(PRICE.toString(),price).apply()
    }
    fun getPrice():Float{
        return preference.getFloat(PRICE.toString(),0.0f)
    }

    fun setSABV(abv:Float){
        preference.edit().putFloat(ALCOHOLBYVOLUME.toString(),abv).apply()
    }
    fun getABV():Float{
        return preference.getFloat(ALCOHOLBYVOLUME.toString(),0.0f )
    }
}
```
when i try to recover the data

```
    Toast.makeText(this, "Price:"+mypreference.getPrice(), Toast.LENGTH_LONG).show()
                Toast.makeText(this, "ABV:"+mypreference.getABV(), Toast.LENGTH_LONG).show()
```

only saves the ABV value in Price and ABV