Solve the following word problems: 1. Lerato has R60. She buys a book for R45 and a ruler for R10. How much money does she have left? 2. If one box of chocolates costs R25, what is the cost of 4 boxes

$$
\text{Total spent} = \text{Cost of book} + \text{Cost of ruler}
$$
$$
\text{Total spent} = \text{R}45 + \text{R}10 = \text{R}55
$$

$$
\text{Money left} = \text{Initial money} - \text{Total spent}
$$
$$
\text{Money left} = \text{R}60 - \text{R}55 = \text{R}5
$$
Lerato has $\boxed{\text{R}5}$ left.

$$
\text{Total cost} = \text{Cost per box} \times \text{Number of boxes}
$$
$$
\text{Total cost} = \text{R}25 \times 4 = \text{R}100
$$
4 boxes of chocolate will cost $\boxed{\text{R}100}$.

$$
\text{Money needed} = \text{Cost of shoes} - \text{Money Liam has}
$$
$$
\text{Money needed} = \text{R}120 - \text{R}80 = \text{R}40
$$
Liam needs $\boxed{\text{R}40}$.

$$
\text{Total cost} = \text{Cost per trip} \times \text{Number of trips}
$$
$$
\text{Total cost} = \text{R}15 \times 3 = \text{R}45
$$
3 taxi trips will cost $\boxed{\text{R}45}$.

$$
\text{Total spent} = \text{Cost of shirt} + \text{Cost of shoes}
$$
$$
\text{Total spent} = \text{R}85 + \text{R}90 = \text{R}175
$$

$$
\text{Money left} = \text{Initial money} - \text{Total spent}
$$
$$
\text{Money left} = \text{R}200 - \text{R}175 = \text{R}25
$$
You have $\boxed{\text{R}25}$ left.

$$
\text{Total spent} = \text{Cost of bread} + \text{Cost of milk} + \text{Cost of eggs}
$$
$$
\text{Total spent} = \text{R}50 + \text{R}30 + \text{R}20 = \text{R}100
$$
The family spent a total of $\boxed{\text{R}100}$.

$$
\text{Total cost} = \text{Cost per apple} \times \text{Number of apples}
$$
$$
\text{Total cost} = \text{R}3 \times 6 = \text{R}18
$$
You pay $\boxed{\text{R}18}$ for 6 apples.