Mrs Tan had $4y$ boxes of tarts. Each box contained 15 tarts. She sold 2 boxes of tarts. Given $y = 8$, how many tarts were left unsold? Answer: ___

1. Find the total number of boxes Mrs Tan had initially

Total boxes = $4y$
Given $y = 8$, total boxes = $4 \times 8 = 32$

2. Find the number of boxes left unsold

Boxes sold = $2$
Boxes left = $32 - 2 = 30$

3. Calculate the total number of tarts left unsold

Tarts per box = $15$
Total tarts left = $30 \times 15 = 450$