userLifetimeValue = {
let values = []
for(let i=0; i<averageUserLifetime; i++) {
let everyOtherYear = i%2 == 0
values[i] = everyOtherYear ? dollarPriceDomain : 0
}
let grossDiscountedProduct = NPVaggregate(discountRate, ...values)
return grossDiscountedProduct
}