Step-by-step explanation: first off you should note that the entry cost being 25 dollars is a one time thing( it should be the number that you add to the amount she pays for 8 months) The first step is to multiply 18 by 8. This is because she pays $18 per month, for 8 months. the product will be $144. Then you add the entry cost which is $25 which in all comes out to $169.