This series of filter hooks will do the job:
if( !is_admin() )
{
add_filter( 'woocommerce_get_sale_price', 'bit_price', 10, 2 );
add_filter( 'woocommerce_get_regular_price', 'bit_price', 10, 2 );
add_filter( 'woocommerce_get_price', 'bit_price', 10, 2 );
add_filter( 'woocommerce_currency_symbol', function( $currency_symbol, $currency ) {
return 'Bits'; //$currency_symbol;
}, 10, 2 );
add_filter( 'woocommerce_currency', function( $currency ) {
return $currency;
});
}
function bit_price( $price, $product )
{
return $price * 0.5;
}