When using a power tool, never engage the?

When using power tools, never engage the trigger lock. Before replacing parts such as bits, blades, or discs on any tool, you must disconnect the power source. Most hammer drills will not hammer until pressure is applied to the drill bit. A pneumatic drill is commonly used when there is no source of electricity.

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360 different combinations

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads