苏菲（Sophie）的月薪为 $6875。 她把其中的 15% 给她的父母。 她把剩余部分的 35% 存入储蓄账户。 计算她在给父母以及存入储蓄账户后，还剩多少钱。结果四舍五入到最接近的元。 答案 $ ... 一套沙发的现金售价为 $830。 苏菲采用信用分期的方式购买了这套沙发。 她支付了现金售价四分之一的定金。 随后，她每月付款 $260，共付 3 个月。 计算苏菲为这套沙发支付的总金额。 答案 $ ... 苏菲每月支付 $3174.20 的租金。 这比她去年的月租金多出 18%。 计算她去年的月租金。 答案 $ ... 假期期间，苏菲去惠灵顿拜访了她的朋友。 苏菲在新西兰用信用卡消费了 940 新西兰元（NZD）。 她需要支付 2.6% 的货币兑换费。 新加坡元（SGD）与新西兰元（NZD）之间的汇率为 SGD 100 = NZD 120.7206。 计算苏菲信用卡账单上的总金额（包含手续费）。 答案以新加坡元表示，四舍五入到最接近的分。 答案 SGD ...

1. Find the amount remaining after Sophie gives 15% of her salary to her parents.

Amount remaining after giving 15%:
$6875 \times 85\% = 6875 \times 0.85 = 5843.75$

2. Find the amount left after putting 35% of the remainder into savings.

She keeps $100\% - 35\% = 65\%$ of the remainder.
$5843.75 \times 65\% = 5843.75 \times 0.65 = 3798.4375$

3. Round the final amount to the nearest dollar.

$3798.4375 \approx 3798$
So the amount left is $3798 to the nearest dollar.

1. Calculate the deposit paid.

Deposit $= \dfrac{1}{4} \times 830 = 207.50$

2. Add the deposit and the 3 monthly payments.

Total paid $= 207.50 + 3 \times 260$

$= 207.50 + 780$

$= 987.50$

1. Express the current rent as a percentage multiplier of last year's rent.

Since the current rent is $18\%$ more than last year's rent,
$100\%+18\%=118\%$
So $3174.20 is $118\%$ of last year's rent.

2. Divide by the multiplier to find last year's monthly rent.

Last year's rent
$=3174.20\div 1.18$
$=2690$

1. Convert NZD 940 to Singapore dollars using the exchange rate.

Since SGD $100$ = NZD $120.7206$,

$\text{SGD amount}=940\times \frac{100}{120.7206}$

$=778.657\ldots$

2. Include the 2.6% currency conversion fee.

A $2.6\%$ fee means the total is $102.6\%$ of the converted amount.

$\text{Total bill}=778.657\ldots \times 1.026$

$=798.902\ldots$

3. Round the total amount to the nearest cent.

$798.902\ldots \approx 798.90$

So the total amount on the credit card bill is SGD $798.90$.