When $1,000$ units are produced and sold, the cost components are shown as below. If the number of units

$1$ point

produced and sold increases to $1,500,$ assuming all costs are within the relevant range, which of the following statements is correct?

$\backslash$table$[[,1,000$ units produced,$1,500$ units produced$],[$Total fixed costs,$45,000,$A$],[$Total variable costs,$5,000,$B$],[$Fixed costs per unit,$45,$C$],[$Variable costs per unit,$5,$D$],[$Total costs per unit,$50,$E$],[$Total costs,$50,000,$F$]]$

Total costs per unit $($E$)$ decrease by $15$

Total costs per unit $($E$)$ remain the same $(50)$

Total costs $(F)$ increase by $25,000(50**500)$

Fixed costs per unit $($C$)$ remain the same $(45)$