Your income of $43,000 puts you at 3.37x the poverty line. Using the updated KFF calculator, you would not need to pay more than 6.93% of $43,000 = $2979.90 for the SLCSP.
The SLCSP costs $927.57 x 12 = $11,130.84. So your new subsidy would be $11,130.84 - $2979.9 = $8150.94 a year or $679.25...