I have this formula:

```
CustomersAdded[t]*CustomerRevenue[0] + CustomersAdded[t-1]*CustomerRevenue[1] + CustomersAdded[t-2]*CustomerRevenue[2]
```

CustomersAdded is a number, CustomerRevenue is a currency amount and is relative.

The idea is that I have an idea of the number of customers I’ll add per month, and then a projected cash flow for month 1, 2 etc

Is there a way of writing this formula so that I don’t have to repeat the `t`

arithmetic? for every month (assuming I want to add more months to this projects cash).