In the figure shown, what is the current (in Ampere) drawn from the battery? You are given :

R₁ = 15 $\Omega$, R₂ = 10 $\Omega$, R₃ = 20 $\Omega$, R₄ = 5 $\Omega$, R₅ = 25 $\Omega$, R₆ = 30 $\Omega$, E = 15 V