Answer:
$4,000
Step-by-step explanation:
Net gross increase = $(40,600 + 40,600 + 1,700 + 1,700) = $84,600
Net gross decrease = - $( 30,200 + 30,200 + 2,300 + 2,300 + 8,300 + 8,300 + 3,500 + 3,500) = -$88,600
∴ Net decrease = -$88,600 + $84,600 = $4,000