CONNECT 700 INSPIRON TO 55" MITSUBISHI TV...

I TOOK A PIC OF THE BACK OF MY TV AND THERE IS NO MONITOR PORT...IT IS 7 YEARS OLD BUT IN WONDERFUL CONDITION....MY SON GAVE ME THE LAP TOP LAST MONTH...IT HAS A MONITOR PORT ON IT....I WENT TO RADIO SHACK WITH MY PIC OF THE BACK OF THE TV AND THEY SAID THEY ONLY HAD A $100 SOLUTION TO THE PROBLEM...A BOX WITH DIFFERENT CONNECTIONS THAT WOULD ENABLE ME TO HOOK UP THE LAP TOP TO THE TV...HARD ON EYES WATCHING NETFLIX MOVIES ON THE LAP TOP...IS THERE A CHEAPER WAY OF ADDRESSING THIS PROBLEM? I AM A WIDOW ON SOC. SECURITY ONLY!!! THANK YOU.....