the question is asking how much are the shirts but i don't know what your asking.
"Dobles a la derecha" is a formal way of saying, "Turn right".
The command is grammatically correct.
Los factores que pueden causar las corrientes oceánicas son el viento, diferencias de densidad el la masa’s de agua causadas por las variaciones de temperatura y salinidad, gravedad, y eventos como terremotos o tormentas. (Translation:
The factors that can cause ocean currents are wind, density differences in the mass of water caused by variations in temperature and salinity, gravity, and events such as earthquakes or storms.)
