Illustrations: ● 3.A and B enter into a contract that B will build a house on A's land for a price.Later they enter into an oral contract by which B promises to add a porch and A promises to pay an extra $2,000.Still later they enter into an integrated agreement in which B promises to build according to the original plans and A promises to pay the extra $2,000.The integrated agreement is not binding for lack of consideration, and the oral intermediate agreement is not discharged. 對卧爱价贸易大鉴 1951Illustrations: z 3. A and B enter into a contract that B will build a house on A's land for a price. Later they enter into an oral contract by which B promises to add a porch and A promises to pay an extra $2,000. Still later they enter into an integrated agreement in which B promises to build according to the original plans and A promises to pay the extra $2,000. The integrated agreement is not binding for lack of consideration, and the oral intermediate agreement is not discharged