The jumbo bottle of shampoo costs $24.00.  The directions say to use 2 pumps of shampoo and this will give you 120 washings.  If Jackie only uses 1 pump per wash, how much will each pump cost, in cents?
2 pumps will give you 120 washes so if she only uses 1 pump per wash she doubles the number of washes so she now has 120*2 = <<120*2=240>>240 washes
The bottle costs $24.00 and she will 240 washes so each wash is 24/240 = $<<24/240=0.10>>0.10
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