Listen to Sportsound and follow live text commentary, score updates and match report from St Mirren vs Motherwell in the Scottish Premiership.

Eberechi Eze is Arsenal's north London derby hero again as they beat Spurs to stretch their lead at the top to five points over Manchester City.

This is all for this live text today but we'll be back for four more important Premier League games. That north London derby could be a cracker. We'll see you again tomorrow. I think as a young player ...

Learn how to distinguish marginal costs by exploring their relationship with fixed and variable costs in production.