 
<translate> Lee na enyi ya nwere ngụkọta nke $10 + $8 = $18. Ọnụ ego nri ahụ bụ $6 + $4 + $1 + $1 = $12. Ọnụ ego nile, gụnyere ụtụ isi, bụ $12 + $3 = $15. Ha kwesịrị ịnata $18 - $15 = $3 n'ozuzu. Azịza ya bụ: 3. <eng> Lee and his friend had a total of $10 + $8 = $18. The cost of the food was $6 + $4 + $1 + $1 = $12. The total cost, including tax was $12 + $3 = $15. They should have received $18 - $15 = $3 in total.
The answer: 3. 