Question

I need the solution too

Answer 1

m=sales on monday
t=sales on tuesday
w=sales on wednesay


m=3t
w=(1/2)t

if m=1200

1200=3t
divide both 3 both sides
400=t

sub int other one

w=t/2
w=400/2
w=200


m=1200
t=400
w=200

total is 1200+400+200=1800

the total sales is RM 1800