2018 Form 1040 Schedule C Line 30: Home Office Deduction: Simplified Method:

TP only used the home office from January 1, 2018 to June 30, 2018, can TP take $1,500 ($5*300 sqft) or $$750?

Based on the instruction, it seems that TP can take the full amount of $1,500.

Is this correct? Does TP need to prorate? Thanks.