![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
The figure above shows the foreign exchange market. D£ is the demand curve for pounds. S£ (Spring-summer) and S£ (Autumn-winter) are the supply curves of pounds during the spring-summer and autumn-winter seasons, respectively. Refer to Figure 20.1, In the spring-summer period, what is the social gain if the British government maintains a fixed exchange rate at $1.90 per pound?