Fight with Ranma at Nerima high school pool
100-ct box of steel-plated bandannas... 200 yen
Waterproof, steel-soled shoes... 8000 yen
Replacement depleted uranium umbrella spines... 14000 yen

Fight with Ranma in high school courtyard
100-ct box of steel-plated bandannas... 200 yen
Replacement flashlight... 700 yen
Replacement pocket knife... 1000 yen
Replacement tent... 10000 yen

Fight with Ranma on class field trip to Disney Japan
2 100-ct boxes of steel-plated bandannas... 400 yen (the tourists took a lot as souvenirs)
Hand-carved Pig-bristle brush for Akane... 8000 yen (mind you, it's for brushing pig's bristles, it's not made of pig's bristles)
Backpacker's Travel Kit including Whistle and Compass... 20000 yen

Fight with Ranma on the bus coming from Disney Japan
100-ct box of steel-plated bandannas... 200 yen
Replacement Backpacker's Travel Kit... 15000 yen (everything costs less away from the tourist-traps, y'know)

The sight of Akane's face when you finally reach home after 3 grueling months... priceless

Some things, even a lost boy like Ryouga can find. For everything else, there's Jyuusenkou.