When can a bill be sent to the president for approval?

A bill can only be sent to president once it has been approved by both the senate and the house and  If the president approves the legislation by signing the document, it becomes law and if he doesn't take any action for ten days and the congress is also in session then it automatically becomes a law.  The president can also oppose the bill by vetoing it. If no action is taken y the president and congress has also adjourned its second session then it is known as pocket veto and the bill dies.

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.

i believe it was the shinto