This is actually available right out of the box. You can set hourly costs at the global, job title, or user level and rates at the global, job title, user, or work item level. Clarizen will automatically roll up these amounts based on the number of work required for each line item.
Totals by task type will be a little bit ore complicated. The easiest way would be creating a report with all tasks sorted by type and then using Excel to sum each category (very easy with a pivot table). Alternatively you can automate this using our Excel-add in. I would recommend hopping on an advanced Q&A for more information.