Prepare journal entries to record the following merchandise transactions of Martinez Excavation Equipment,which applies the perpetual inventory system. 
Definitions:
Depolarization
A reduction in the difference in electrical charge across a cell's plasma membrane, typically leading to nerve impulse transmission or muscle contraction.
Electrocardiogram
A diagnostic tool that measures and records the electrical activity of the heart to detect abnormalities.
P Wave
The first wave in an ECG, representing the depolarization of the atria before the heart beats.
QRS Complex
Principal deflection in the electrocardiogram, representing ventricular depolarization.
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