Answer:
En la agencia le dijimos a la directora que para nosotras abril era el mejor mes del año. Por eso, queríamos hacer el viaje en ese mes. Con la agente hicimos los planes. Íbamos a pescar por el río. Íbamos a hacer una excursión por el parque nacional. Íbamos a pasar quince días viajando por toda la región. ¿Cuánto pagamos por un viaje tan bonito? ¡Sólo $850! ¡Para mí era una ganga!
Step-by-step explanation:
At the agency we told the director that for us April was the best month of the year. Therefore, we wanted to make the trip in that month. We made the plans with the agent. We were going to fish by the river. We were going to take a tour of the national park. We were going to spend fifteen days traveling throughout the region. How much do we pay for such a beautiful trip? Only $ 850! It was a bargain for me!
The prepositions "by" and "for" are used as follows: Remember that "by" is used to explain the cause or motive of something; while "for" usually refers to the purpose of an action.