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

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 ...

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

You do not need to look far to find people proclaiming that VAR works fine outside the Premier League. BBC Sport spoke to people across Europe's top leagues to find out.

Mechanical locking and limited-slip differentials use gears and geometry to manage wheel speed, but electronics provide more subtle control.

Aston Villa's Lucas Digne handballs inside the area against Newcastle in the FA Cup on Saturday X/@footballontnt The Athletic FC ⚽ is The Athletic’s daily football (or soccer, if you prefer) ...

After a weekend of FA Cup action without VAR, BBC Sport ask managers, fans and pundits whether the game needs technology - and what needs to change.

Tottenham captain Cristian Romero is sent off as goals from Bryan Mbeumo and Bruno Fernandes give Manchester United victory ...

In 2020, Connie Sherburne's husband of 31 years, Peter, died in a crash while piloting their small plane. Sherburne, a practical person, immediately focused on what needed to be done. "I went home ...