Bantu ya hehe:))))) thankyou

[tex]wtot = v1 \times i1 \times t1 + v2 \times i2 \times t2 + v3 \times i3 \times t3 \\ = 220 \times 1 \times 4 + 220 \times1 .3 \times 8 + 220 \times 0.3 \times 12 \\ = 880 + 2288 + 792 \\ = 3960[/tex]