Candle Batch

Mia pours 50 candles. The weights (in grams) of the candles are independent and identically distributed, each exponentially distributed with rate $\lambda=\frac{1}{200}$ (mean 200 g). Let $T=W_1+\dots+W_{50}$ be the total weight of the batch.

Using Markov's inequality, what is the resulting upper bound on $\mathbb{P}[T\ge 12500]$? Give a decimal.