14. (10 points) Team A and Team B need to transport a batch of relief supplies to an earthquake-stricken area. Team A can transport 64.4 tons per day, which is 75% more than Team B; if Team A and Team B transport simultaneously, when Team A has transported half of all the relief supplies, it has transported 138 tons more than Team B. How many tons of relief supplies are there in total?
【Solution】Solution: The tons of goods transported by Team B each day: $64.4 \div(1+75 \%)=36.8$ (tons), the tons of goods transported more by Team A than Team B each day: $64.4-36.8=27.6$ (tons), the number of days required for Team A to transport 138 tons more than Team B: $138 \div 27.6=5$ (days), the tons of goods transported by Team A in 5 days: $64.4 \times 5=322$ (tons), the total tons of this batch of relief supplies: $322 \div \frac{1}{2}=644$ (tons), Answer: This batch of relief supplies totals 644 tons.