Calculator Stretch and Stretch (WordPress+WooCommerce)

Description of the task:
You need to turn up and stretch the block with the calculator. Block to make functional (programming to JS).

The layer must be adaptive to PCs, tablets and mobile devices.
Basic Requirements for the Wreck:

the crossbrowsing;
the adaptability;
Minimum of code;
High speed of page.

Implemented entries:
The product card is made according to the design,
A calculator is created and programmed on the "Calculated Fields Form" plug-in.
Added items with the use of "ACF".
Each detail can be both edited and modified depending on the needs of the seller.