Identify the currency and its symbols for the two (2) countries listed below. Country: Japan, Singapore. Currency: Yen. Currency Symbol: SG$.

$$\text{Total Cost (AUD)} = \text{Price of phone} + \text{Postage}$$

$\text{Total Cost (AUD)} = \$80 + \$50 = \$130$

The exchange rate is K1 = 0.3938 AUD. To find out how many Kina are needed for $130 AUD, divide the total AUD by the exchange rate.

$$\text{Kina needed} = \frac{\text{Total Cost (AUD)}}{\text{Exchange Rate (AUD per Kina)}}$$ $$\text{Kina needed} = \frac{130}{0.3938}$$ $$\text{Kina needed} \approx 330.1168$$

Rounding to two decimal places for currency:

$$\text{Kina needed} \approx \text{K}330.12$$

Vicky will have to convert K330.12 into Australian dollars.

$$\boxed{\text{K}330.12}$$