A ladder company produces blue ladders and green ladders. There is a demand of at least 100 blue ladders and 70 green ladders per day. Due to costs, no more than 160 blue ladders and no more than 150 green ladders can be produced per day. To satisfy a contract with a store, a total of at least 215 ladders must be shipped each day. If each blue ladder sold results in a $5 profit and each green ladder sold results in a $3 loss, how many green ladders should be produced to net a profit of $155? Please provide the numerical solution without any units.