$2300 + $1700 + $1400 = $5400 a month total
$5400 × 12 months in a year = $64,800 a year total
If you want to know how much she pays EACH employee a year, do the same thing for each amount:
$2400 × 12 months a year = $28,800
$1700 × 12 months a year = $20,400
$1400 × 12 months a year = $16,800