Consider a telecommunication service provider. You have the following quarterly data:

STATISTICS	TYPICAL CONSUMER
Number of referrals per period (n=n1+ n2)	5
of which, customers that joined due to the referral (n1)	3
of which, customers that would have joined anyway (n2)	2
Marketing cost per period (Mty)	$30
Average gross margin (Aty)	$78
Cost of referral (aty)	$15
Acquisition cost savings (ACQ1ty and ACQ2ty)	$10
Yearly discount rate (r)	15%

Calculate CRV of a typical customer for one year (over 4 quarters).