how much does it cost to replace the struts on this my ford explorer

Front? Rear? Do you have the Vehicle Dynamic Suspension (auto adjustable rear air shocks)? If you have the standard suspension, the shock absorbers are not strut type and are simple replacements. If you have the rear air shocks, the parts are more expensive, and the labor is modestly more pricy. Expect standard shock pricing to be between $150-$200 per axle.