Convert Time into Years

Since the interest rate is per annum, time must be expressed in years. Given time is $219$ days. Converting it to years: $T = \frac{219}{365} = \frac{3}{5}$ years.

$T = \frac{219}{365} = 0.6 \text{ years}$

Apply Simple Interest Formula

Substitute the values of Principal $P = 8500$, Rate $R = 8$, and Time $T = 3/5$ into the simple interest formula: $SI = \frac{P \times R \times T}{100}$.

$SI = \frac{8500 \times 8 \times \frac{3}{5}}{100}$

Calculate the Interest

Simplify the expression: $\frac{8500}{100} = 85$. Then, $85 \times 8 = 680$, and $680 \times \frac{3}{5} = 136 \times 3 = 408$.

$SI = 85 \times 8 \times 0.6 = 408$