[cmutel]

As far as I understand, current state-of-the-art is between $100-200 per ton CO2 (see https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3). This is from the CO2 capture company Bill Gates has invested in, FWIW.

[lozenge]

Yes, multiply that by about three to get the cost per ton of carbon then add the cost of sequestration - your paper only includes the initial capture.