Placido Lucero is retired and covered by Medicare Parts A & B. His retirement plan covers 75% of his Medicare HMO annual premium of $4,200. His retirement plan also covers 50% of his wife's Medicare HMO annual premium of $4,200. Also, Placido has a dependent grandchild whose HMO annual premium of $3,600 is 40% covered by his retirement plan. What is the monthly amount deducted from Placido's retirement check for healthcare?