QB Issue Resolution:

Lists | Templates.

Then edit the template you’re using and click Additional Customization.

Then select the Print tab and pick Print Trailing zeros and pick Two from the list.

Resolution for Issue 'How do I change the “price” from $1.5 to $1.50 on the invoices?' available: Yes (Solved).
Source: Intuit Community forum.

How do I change the “price” from $1.5 to $1.50 on the invoices?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Additional Customization
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Error Recovery for Additional Customization [Canada]
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Additional Support Options: