Answer
$52,900
Work Step by Step
You have to take answer (4), multiply it by 5 to get the pounds needed:
$10,400\times5 = 52,000$ then add the ending inventory of 10% of next month's need: $61,000\times(10\div100)=6,100$ and remove the beginning inventory (10% of current month): $52,000\times0.1=5,200$
All of this makes: $52,000+6,100-5,200=52,900$
