```
<ngx-datatable
   [rows]="services"
   [columns]="columns">
</ngx-datatable>

```

I can get this to display nested data with:

```
{ prop: order.product.price }

```

How do you do you display a custom calculation in a row?
What if I want to apply a fee to the price

```
{ prop: 'order.product.price + order.fee' }

```

I guess I would need access to the other values in the row.