Broken fuel gauge & speedometer/odometer

I have a 1992 Isuzu Rodeo, 5 speed, V6, 3.2L, 4WD with 153,840 miles. My fuel gauge quit working about 3 months ago & can't find any cause. Any suggestions? Then, yesterday, as I was merging on expressway, my speedometer dropped to 0 & my odometer quit working as well. I would appreciate some advice for the quickest, cheapest & easiest way to resolve since I am a working mom of 3 & my own mechanic! LOL Any & all details, instructions, locations & even photos if you got 'em would be greatly beneficial! OH YEAH, btw I'll make a donation just as soon as I can locate that money tree (just teasing-next payday) PROMISE!