To calculate the total food cost, we use the following formula:
\(
\text{Total Food Cost} = \text{Opening Stock} + \text{Fresh Purchases} - \text{Closing Stock} + \text{Food Consumed by Staff} + \text{Food Served to Guests (Complimentary)}
\)
Substituting the given values:
\[
\text{Total Food Cost} = 2,500 + 15,000 - 1,500 + 800 + 500
\]
\[
\text{Total Food Cost} = 17,300 \, \text{₹}
\]
Now, we calculate the percentage of food cost to net sales using the formula:
\[
\text{Percentage of Food Cost to Net Sales} = \left( \frac{\text{Total Food Cost}}{\text{Total Sales}} \right) \times 100
\]
Substitute the values:
\[
\text{Percentage} = \left( \frac{17,300}{70,000} \right) \times 100 = 24.71%
\]
Thus, the total food cost is ₹17,300 and the percentage of food cost to net sales is 24.71%.