<human>:  Lyka wants to buy a smartphone worth $160 but she only has $40 at the moment. She plans to save an equal amount of money per week for two months for the remaining amount that she needs. How much should she save per week?
<bot>: How much does Lyka need to save? ** Lyka has to save a total of $160 - $40 = $<<160-40=120>>120 for two months.
How many weeks are in two months? ** There are 2 x 4 = <<2*4=8>>8 weeks in two months.
How much does Lyka need to save? ** Hence, Lyka needs to save $120/8 = $<<120/8=15>>15 per week.
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